57131394 has 16 divisors (see below), whose sum is σ = 114447168. Its totient is φ = 19013072.

The previous prime is 57131377. The next prime is 57131413. The reversal of 57131394 is 49313175.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3477 + ... + 11240.

It is an arithmetic number, because the mean of its divisors is an integer number (7152948).

Almost surely, 2^57131394 is an apocalyptic number.

57131394 is an abundant number, since it is smaller than the sum of its proper divisors (57315774).

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

57131394 is a wasteful number, since it uses less digits than its factorization.

57131394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15369.

The product of its digits is 11340, while the sum is 33.

The square root of 57131394 is about 7558.5312065242. The cubic root of 57131394 is about 385.1455996217.

The spelling of 57131394 in words is "fifty-seven million, one hundred thirty-one thousand, three hundred ninety-four".