211 (number)

For other uses, see 211 (disambiguation).

← 210 211 212 →
← 210 211 212 213 214 215 216 217 218 219 → List of numbers Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	two hundred eleven
Ordinal	211th (two hundred eleventh)
Factorization	prime
Prime	47th
Divisors	1, 211
Greek numeral	ΣΙΑ´
Roman numeral	CCXI, ccxi
Binary	110100112
Ternary	212113
Senary	5516
Octal	3238
Duodecimal	15712
Hexadecimal	D316

211 (two hundred [and] eleven) is the natural number following 210 and preceding 212. It is also a prime number.

In mathematics

• 211 is the sum of three consecutive primes ($67+71+73$), a Chen prime, a centered decagonal prime, and a self prime.
• 211 is the smallest prime separated by 12 from the nearest primes (199 and 223). It is thus a balanced prime and an isolated prime.
• 211 is a repdigit in tetradecimal (111).
• 211 is the 47th prime number and therefore it is a super-prime.
• 211 is the fourth Euclid number, being $2\times 3\times 5\times 7+1$.

In other fields

• 211 is also a nickname for Steel Reserve, a malt liquor alcoholic beverage.
• 211 is also the country code for South Sudan.
• 211 is also SMTP status code for system status.