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