227 (number)

← 226 228 → 227
← 200 210 220 230 240 250 260 270 280 290 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	Two hundred [and] twenty-seven
Ordinal	227th (Two hundred [and] twenty-seventh)
Factorization	prime
Roman numeral	CCXXVII
Binary	111000112
Octal	3438
Duodecimal	16B12
Hexadecimal	E316

227 is the natural number between 226 and 228. It is also a prime number.

In mathematics

227 is a prime number, and a twin prime with 229 (thus 227 is a Chen prime). 223 plus 4 is 227, so they are cousin primes. 227 plus 6 is 233, making 227 and 233 sexy primes; furthermore, 227, 233, and 239 form a sexy prime triplet.

Since (227 - 1)/2 is 113, also a prime, 227 is a safe prime.

It is also a regular prime. 227 is an Eisenstein prime with no imaginary part, and also a Gaussian prime. 227 is a Stern prime since it is not of the form $p + 2b^2$.

It can be written as the sum of the sum and the product of the first four primes: $(2 + 3 + 5 + 7)+(2 \times 3 \times 5 \times 7) = 227$

In popular culture

• 227, an NBC sitcom which ran from 1985-1990.
• 227 was the highest score ever in the Eurovision Song Contest, achieved by Katrina and the Waves of the UK in 1997, before the Semi-final system was introduced in 2004.
• 227 is the number of days Pi Patel was at sea in the popular novel, Life of Pi

References

http://primes.utm.edu/curios/page.php/227.html