57311312 has 20 divisors (see below), whose sum is σ = 114623616. Its totient is φ = 27731040.

The previous prime is 57311311. The next prime is 57311323. The reversal of 57311312 is 21311375.

57311312 is an admirable number.

It is a super-2 number, since 2×57311312² = 6569172966322688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57311311) 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, 57278 + ... + 58269.

Almost surely, 2^57311312 is an apocalyptic number.

It is an amenable number.

57311312 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

57311312 is a wasteful number, since it uses less digits than its factorization.

57311312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115586 (or 115580 counting only the distinct ones).

The product of its digits is 630, while the sum is 23.

The square root of 57311312 is about 7570.4235020242. The cubic root of 57311312 is about 385.5494757124.

Adding to 57311312 its reverse (21311375), we get a palindrome (78622687).

The spelling of 57311312 in words is "fifty-seven million, three hundred eleven thousand, three hundred twelve".