213725644 has 24 divisors (see below), whose sum is σ = 408392208. Its totient is φ = 97059840.

The previous prime is 213725599. The next prime is 213725651. The reversal of 213725644 is 446527312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92892 + ... + 95164.

It is an arithmetic number, because the mean of its divisors is an integer number (17016342).

Almost surely, 2^213725644 is an apocalyptic number.

It is an amenable number.

213725644 is a deficient number, since it is larger than the sum of its proper divisors (194666564).

213725644 is a wasteful number, since it uses less digits than its factorization.

213725644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425 (or 4423 counting only the distinct ones).

The product of its digits is 40320, while the sum is 34.

The square root of 213725644 is about 14619.3585358592. The cubic root of 213725644 is about 597.8866800184.

It can be divided in two parts, 213725 and 644, that added together give a square (214369 = 463²).

The spelling of 213725644 in words is "two hundred thirteen million, seven hundred twenty-five thousand, six hundred forty-four".