57664531 has 2 divisors, whose sum is σ = 57664532. Its totient is φ = 57664530.

The previous prime is 57664517. The next prime is 57664543. The reversal of 57664531 is 13546675.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57664531 - 2⁷ = 57664403 is a prime.

It is a super-2 number, since 2×57664531² = 6650396270899922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57664511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28832265 + 28832266.

It is an arithmetic number, because the mean of its divisors is an integer number (28832266).

Almost surely, 2^57664531 is an apocalyptic number.

57664531 is a deficient number, since it is larger than the sum of its proper divisors (1).

57664531 is an equidigital number, since it uses as much as digits as its factorization.

57664531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 37.

The square root of 57664531 is about 7593.7165472514. The cubic root of 57664531 is about 386.3399222287.

The spelling of 57664531 in words is "fifty-seven million, six hundred sixty-four thousand, five hundred thirty-one".