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222 (number)
Encyclopedia
| Cardinal Cardinal number In mathematics, cardinal numbers, or cardinals for short, are a generalization of the natural numbers used to measure the cardinality of sets. The cardinality of a finite set is a natural number – the number of elements in the set. The transfinite cardinal numbers describe the sizes of infinite... |
Two hundred [and] twenty-two |
| Ordinal Ordinal number In set theory, an ordinal number, or just ordinal, is the order type of a well-ordered set. They are usually identified with hereditarily transitive sets. Ordinals are an extension of the natural numbers different from integers and from cardinals... |
222nd |
| Factorization Factorization In mathematics, factorization or factoring is the decomposition of an object into a product of other objects, or factors, which when multiplied together give the original... |  |
| Roman numeral | CCXXII |
| Binary Binary numeral system The binary numeral system, or base-2 number system, represents numeric values using two symbols, 0 and 1. More specifically, the usual base-2 system is a positional notation with a radix of 2... |
11011110 |
| Hexadecimal Hexadecimal In mathematics and computer science, hexadecimal is a positional numeral system with a radix, or base, of 16. It uses sixteen distinct symbols, most often the symbols 0–9 to represent values zero to nine, and A, B, C, D, E, F to represent values ten to fifteen... |
DE |
222 (two hundred
200 (number)
200 is the natural number following 199 and preceding 201.The number appears in the Padovan sequence, preceded by 86, 114, 151 ....
[and] twenty-two) is the natural number following 221
221 (number)
221 is the natural number following 220 and preceding 222.-In mathematics:221 is:* a semiprime* the sum of five consecutive prime numbers...
and preceding 223
223 (number)
223 is the natural number between 222 and 224. It is also a prime number.-In mathematics:223 is a long prime, a strong prime, a lucky prime and a sexy prime .223 is the fourth Carol number and the third to be prime....
. It is a repdigit
Repdigit
In recreational mathematics, a repdigit is a natural number composed of repeated instances of the same digit, most often in the decimal numeral system....
composite number
Composite number
A composite number is a positive integer which has a positive divisor other than one or itself. In other words a composite number is any positive integer greater than one that is not a prime number....
, and its factorization makes it a sphenic number
Sphenic number
In number theory, a sphenic number is a positive integer which is the product of three distinct prime numbers.Note that this definition is more stringent than simply requiring the integer to have exactly three prime factors; e.g. 60 = 22 × 3 × 5 has exactly 3 prime factors, but is not sphenic.All...
. It is also a Harshad number
Harshad number
A Harshad number, or Niven number in a given number base, is an integer that is divisible by the sum of its digits when written in that base. Harshad numbers were defined by D. R. Kaprekar, a mathematician from India. The word "Harshad" comes from the Sanskrit + , meaning joy-giver. The Niven...
.
There is no solution to the equation x - φ
Euler's totient function
In number theory, the totient \varphi of a positive integer n is defined to be the number of positive integers less than or equal to n that are coprime to n In number theory, the totient \varphi(n) of a positive integer n is defined to be the number of positive integers less than or equal to n that...
(x) = 222, making 222 a noncototient
Noncototient
In mathematics, a noncototient is a positive integer n that cannot be expressed as the difference between a positive integer m and the number of coprime integers below it. That is, m − φ = n, where φ stands for Euler's totient function, has no solution for m...
. Nor is there, in base 10, an integer that added to the sum of its own digits yields 222, making 222 a self number
Self number
A self number, Colombian number or Devlali number is an integer which, in a given base, cannot be generated by any other integer added to the sum of that other integer's digits. For example, 21 is not a self number, since it can be generated by the sum of 15 and the digits comprising 15, that is,...
.
Radii at 0° and approximately 222.49° divide a circle in the golden ratio
Golden ratio
In mathematics and the arts, two quantities are in the golden ratio if the ratio of the sum of the quantities to the larger quantity is equal to the ratio of the larger quantity to the smaller one. The golden ratio is an irrational mathematical constant, approximately 1.61803398874989...
.
Repdigit
In recreational mathematics, a repdigit is a natural number composed of repeated instances of the same digit, most often in the decimal numeral system....
in the square root
Square root
In mathematics, a square root of a number x is a number r such that r2 = x, or, in other words, a number r whose square is x...
of 222 is 222:
- √222 =
- 14.89966442575133971933181604612395114023452166218124
- 73380574030119289350747022456370098357196526519656
- 52139396484012226637696242316850851449289924... 395612895/26551799
A prime reciprocal magic square
Prime reciprocal magic square
A prime reciprocal magic square is a magic square using the decimal digits of the reciprocal of a prime number.Consider a number divided into one, like 1/3 or 1/7. In base ten, the remainder, and so the digits, of 1/3 repeats at once: 0·3333... However, the remainders of 1/7 repeat over six, or...
based on 223 in base
Numeral system
A numeral system is a writing system for expressing numbers, that is a mathematical notation for representing numbers of a given set, using graphemes or symbols in a consistent manner....
three has a magic constant of 222
222
Year 222 was a common year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Antoninus and Severus...
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Given 10 unlabelled nodes, 222 lattices can be created.
Other meanings
Two hundred and twenty-two is also:- Dewey Decimal System 222 is Historical Books of the Old Testament.
- Room 222Room 222Room 222 is an American comedy-drama television series produced by 20th Century Fox Television. The series aired on ABC from September 17, 1969, to January 11, 1974, for 112 episodes...
(TV show) - Bell 222Bell 222The Bell 222 is a twin-engined light helicopter built by Bell Helicopter. The Bell 230 is an improved development with different engines and other minor changes. A cosmetically modified version of the 222 was used as the titular aircraft in the US television series Airwolf.-Development:In the late...
(helicopter) - The year, see CE 222222Year 222 was a common year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Antoninus and Severus...
or 222 BCE222 BCYear 222 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Marcellus and Calvus...
. - The score in the 1916 Cumberland vs. Georgia Tech football game, with Georgia TechGeorgia Tech Yellow JacketsThe Yellow Jackets is the name used for all of the intercollegiate athletic teams that play for the Georgia Institute of Technology in Atlanta, Georgia. The teams have also been nicknamed the Ramblin' Wreck, Engineers, Blacksmiths, and Golden Tornado. There are 8 men's and 7 women's teams that...
winning 222-0, was the record for most points scored by one team in an American footballAmerican footballAmerican football is a sport played between two teams of eleven with the objective of scoring points by advancing the ball into the opposing team's end zone. Known in the United States simply as football, it may also be referred to informally as gridiron football. The ball can be advanced by...
game. - SdKfz 222, a WWII German reconnaissance vehicle.
- In the animated TV show 12 oz. Mouse12 oz. Mouse12 oz. Mouse is an animated television series that aired on the American channel Cartoon Network as part of the Adult Swim late night programming block. The show centers on the antisocial actions of an alcoholic mouse known as "Mouse Fitzgerald", "Fitz," "Butch," or simply "Mouse"...
, time is stuck at 2:22. - 222 is an over the counter drug that contains ASAAspirinAspirin , also known as acetylsalicylic acid , is a salicylate drug, often used as an analgesic to relieve minor aches and pains, as an antipyretic to reduce fever, and as an anti-inflammatory medication. It was discovered by Arthur Eichengrun, a chemist with the German company Bayer...
and codeineCodeineCodeine or 3-methylmorphine is an opiate used for its analgesic, antitussive, and antidiarrheal properties...
, see co-codaprinCo-codaprinCo-codaprin is a non-proprietary name used to denote a compound analgesic, a combination of codeine phosphate with aspirin.Co-codaprin tablets are used for mild to moderate pain.-Canada:...
. - The 222sThe 222sThe 222s are a Canadian punk band first active from 1977 to 1981. They are most famous for their 1978 single "I Love Suzan". They reformed in 2010.-History:...
is a Montreal punk band which took its name from the aforementionned drug - 222 is the title of a comedy album by Patton OswaltPatton OswaltPatton Oswalt is an American stand-up comedian, writer, actor and voice actor. He is best known for portraying Spencer Olchin in the popular sitcom The King of Queens, voicing Remy from the film Ratatouille and Thrasher from the Cartoon Network original series Robotomy.-Early life:Oswalt was born...
. It is the full version of the same show recorded on his previous album, Feelin' Kinda PattonFeelin' Kinda Patton-Personnel:*Patton Oswalt - Performer*Ron Baldwin - Producer*Henry H. Owings - Producer*Chris Bilheimer - Design*Fred Maher - Mixing*Brian McCall - Photography-See also:*No Reason to Complain*Patton vs. Alcohol vs. Zach vs. Patton...
. - "222" is a song by Paul McCartneyPaul McCartneySir James Paul McCartney, MBE, Hon RAM, FRCM is an English musician, singer-songwriter and composer. Formerly of The Beatles and Wings , McCartney is listed in Guinness World Records as the "most successful musician and composer in popular music history", with 60 gold discs and sales of 100...
on the 2-CD edition of his 2007 studio album Memory Almost FullMemory Almost FullMemory Almost Full is the 14th studio album by Paul McCartney, released in the United Kingdom on 4 June 2007 and in the United States a day later. The album was the first release on Starbucks' Hear Music label...
. - The return of WWE wrestler Chris JerichoChris JerichoChristopher Keith Irvine , better known by his ring name Chris Jericho, is an inactive Canadian-American professional wrestler, musician, songwriter, radio personality, television host, actor, author, and dancer...
was slowly hyped by a series of mysterious promos featuring the cryptic code "SAVE_US.222". - A 222 or Two Two Two is a standard British Railway Key.
- In the Jerry LewisJerry LewisJerry Lewis is an American comedian, actor, singer, film producer, screenwriter and film director. He is best known for his slapstick humor in film, television, stage and radio. He was originally paired up with Dean Martin in 1946, forming the famed comedy team of Martin and Lewis...
movie The Nutty ProfessorThe Nutty ProfessorThe Nutty Professor is a 1963 Paramount Pictures science fiction comedy feature film produced, directed, co-written and starring Jerry Lewis...
, the main character tells the school's dean that he's been employed with the school for "two years and 22 minutes." This occurs at the film's beginning, after the professor blows up his own classroom. - A-222 Bereg, a Russian self-propelled 130 mm coastal defence gun