57131318 has 4 divisors (see below), whose sum is σ = 85696980. Its totient is φ = 28565658.

The previous prime is 57131279. The next prime is 57131341. The reversal of 57131318 is 81313175.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14282828 + ... + 14282831.

It is an arithmetic number, because the mean of its divisors is an integer number (21424245).

Almost surely, 2^57131318 is an apocalyptic number.

57131318 is a deficient number, since it is larger than the sum of its proper divisors (28565662).

57131318 is a wasteful number, since it uses less digits than its factorization.

57131318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28565661.

The product of its digits is 2520, while the sum is 29.

The square root of 57131318 is about 7558.5261790907. The cubic root of 57131318 is about 385.1454288395.

The spelling of 57131318 in words is "fifty-seven million, one hundred thirty-one thousand, three hundred eighteen".