57218564 has 12 divisors (see below), whose sum is σ = 107835084. Its totient is φ = 26408544.

The previous prime is 57218563. The next prime is 57218597. The reversal of 57218564 is 46581275.

It can be written as a sum of positive squares in 2 ways, for example, as 35521600 + 21696964 = 5960^2 + 4658^2 .

It is not an unprimeable number, because it can be changed into a prime (57218561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550127 + ... + 550230.

It is an arithmetic number, because the mean of its divisors is an integer number (8986257).

Almost surely, 2^57218564 is an apocalyptic number.

It is an amenable number.

57218564 is a deficient number, since it is larger than the sum of its proper divisors (50616520).

57218564 is a wasteful number, since it uses less digits than its factorization.

57218564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100374 (or 1100372 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 57218564 is about 7564.2953406117. The cubic root of 57218564 is about 385.3413827043.

The spelling of 57218564 in words is "fifty-seven million, two hundred eighteen thousand, five hundred sixty-four".