213 (number)

213 (two hundred [and] thirteen) is the number following 212 and preceding 214.

← 212 213 214 →
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Cardinal	two hundred thirteen
Ordinal	213th (two hundred thirteenth)
Factorization	3 × 71
Divisors	1, 3, 71, 213
Greek numeral	ΣΙΓ´
Roman numeral	CCXIII
Binary	110101012
Ternary	212203
Octal	3258
Duodecimal	15912
Hexadecimal	D516

It is the smallest of a triple consecutive numbers that are products of two distinct prime numbers: 213 = 3 × 71, 214 = 2 × 107, and 215 = 5 × 43.[1] Its square is a sum of distinct factorials: 213² = 45369 = 1! + 2! + 3! + 7! + 8!.[2]

See also

• 213, a hip hop music group
• Area code 213
• 213 Lilaea a main belt asteroid.
• +213 is the code for international direct-dial phone calls to Algeria.

References

1. Sloane, N. J. A. (ed.). "Sequence A039833 (Smallest of three consecutive squarefree numbers n, n+1, n+2 of the form p*q where p and q are primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation..
2. Sloane, N. J. A. (ed.). "Sequence A014597 (Numbers n such that n^2 is a sum of distinct factorials)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation..