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 | |||
Senary | 5536 | |||
Octal | 3258 | |||
Duodecimal | 15912 | |||
Hexadecimal | D516 |
213 and the other permutations of its digits are the only three-digit number whose digit sums and digit products are equal.[1] It is a member of the quickly-growing Levine sequence, constructed from a triangle of numbers in which each row counts the copies of each value in the row below it.[2][3]
As the product of the two distinct prime numbers 3 and 71, it is a semiprime, the first of a triple of three consecutive semiprimes 213, 214, and 215.[4] Its square, 2132 = 45369, is one of only 15 known squares that can be represented as a sum of distinct factorials.[5]