213685924 has 9 divisors (see below), whose sum is σ = 374001537. Its totient is φ = 106828344.

The previous prime is 213685909. The next prime is 213685943. The reversal of 213685924 is 429586312.

The square root of 213685924 is 14618.

It is a perfect power (a square), and thus also a powerful number.

213685924 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 94439524 + 119246400 = 9718^2 + 10920^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 25582 + ... + 32890.

Almost surely, 2^213685924 is an apocalyptic number.

213685924 is the 14618-th square number.

It is an amenable number.

213685924 is a deficient number, since it is larger than the sum of its proper divisors (160315613).

213685924 is an frugal number, since it uses more digits than its factorization.

213685924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14622 (or 7311 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The cubic root of 213685924 is about 597.8496394934.

The spelling of 213685924 in words is "two hundred thirteen million, six hundred eighty-five thousand, nine hundred twenty-four".