57731457 has 24 divisors (see below), whose sum is σ = 89848416. Its totient is φ = 32876928.

The previous prime is 57731417. The next prime is 57731461. The reversal of 57731457 is 75413775.

It is not a de Polignac number, because 57731457 - 2²⁰ = 56682881 is a prime.

It is a super-2 number, since 2×57731457² = 6665842254685698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57731407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63198 + ... + 64104.

It is an arithmetic number, because the mean of its divisors is an integer number (3743684).

Almost surely, 2^57731457 is an apocalyptic number.

It is an amenable number.

57731457 is a deficient number, since it is larger than the sum of its proper divisors (32116959).

57731457 is a wasteful number, since it uses less digits than its factorization.

57731457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357 (or 1350 counting only the distinct ones).

The product of its digits is 102900, while the sum is 39.

The square root of 57731457 is about 7598.1219390057. The cubic root of 57731457 is about 386.4893276989.

The spelling of 57731457 in words is "fifty-seven million, seven hundred thirty-one thousand, four hundred fifty-seven".