57664231 has 2 divisors, whose sum is σ = 57664232. Its totient is φ = 57664230.

The previous prime is 57664207. The next prime is 57664273. The reversal of 57664231 is 13246675.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57664231 - 2⁵ = 57664199 is a prime.

It is a super-2 number, since 2×57664231² = 6650327073642722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57664331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28832115 + 28832116.

It is an arithmetic number, because the mean of its divisors is an integer number (28832116).

Almost surely, 2^57664231 is an apocalyptic number.

57664231 is a deficient number, since it is larger than the sum of its proper divisors (1).

57664231 is an equidigital number, since it uses as much as digits as its factorization.

57664231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 57664231 is about 7593.6967940523. The cubic root of 57664231 is about 386.3392522491.

The spelling of 57664231 in words is "fifty-seven million, six hundred sixty-four thousand, two hundred thirty-one".