227 (number)

227 (two hundred [and] twenty-seven) is the natural number between 226 and 228. It is also a prime number.

← 226 227 228 →
← 220 221 222 223 224 225 226 227 228 229 → List of numbers Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	two hundred twenty-seven
Ordinal	227th (two hundred twenty-seventh)
Factorization	prime
Prime	yes
Greek numeral	ΣΚΖ´
Roman numeral	CCXXVII
Binary	111000112
Ternary	221023
Senary	10156
Octal	3438
Duodecimal	16B12
Hexadecimal	E316

In mathematics

227 is a twin prime, and the start of a prime triplet^[1] 227 is a safe prime, a regular prime,^[2] a Pillai prime,^[3] a Stern prime,^[4] and a Ramanujan prime.^[5]

References

1. Sloane, N. J. A. (ed.). "Sequence A022004 (Initial members of prime triples (p, p+2, p+6))". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
2. Sloane, N. J. A. (ed.). "Sequence A007703 (Regular primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
3. Sloane, N. J. A. (ed.). "Sequence A063980 (Pillai primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
4. Sloane, N. J. A. (ed.). "Sequence A042978 (Stern primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
5. Sloane, N. J. A. (ed.). "Sequence A104272 (Ramanujan primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.