57213568 has 32 divisors (see below), whose sum is σ = 120689460. Its totient is φ = 26923008.

The previous prime is 57213487. The next prime is 57213577. The reversal of 57213568 is 86531275.

It can be written as a sum of positive squares in 2 ways, for example, as 44195904 + 13017664 = 6648^2 + 3608^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10971 + ... + 15322.

Almost surely, 2^57213568 is an apocalyptic number.

It is an amenable number.

57213568 is an abundant number, since it is smaller than the sum of its proper divisors (63475892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57213568 is a wasteful number, since it uses less digits than its factorization.

57213568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26324 (or 26312 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 57213568 is about 7563.9650977513. The cubic root of 57213568 is about 385.3301671043.

The spelling of 57213568 in words is "fifty-seven million, two hundred thirteen thousand, five hundred sixty-eight".