213 (number)

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← 212 213 214 →
Cardinaltwo hundred thirteen
Ordinal213th
(two hundred thirteenth)
Factorization3 × 71
Divisors1, 3, 71, 213
Greek numeralΣΙΓ´
Roman numeralCCXIII
Binary110101012
Ternary212203
Quaternary31114
Quinary13235
Senary5536
Octal3258
Duodecimal15912
HexadecimalD516
VigesimalAD20
Base 365X36

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

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[edit]

References[edit]

  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..