57131385 has 16 divisors (see below), whose sum is σ = 96221760. Its totient is φ = 28866240.

The previous prime is 57131377. The next prime is 57131413. The reversal of 57131385 is 58313175.

It is not a de Polignac number, because 57131385 - 2³ = 57131377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99946 + ... + 100515.

It is an arithmetic number, because the mean of its divisors is an integer number (6013860).

Almost surely, 2^57131385 is an apocalyptic number.

It is an amenable number.

57131385 is a deficient number, since it is larger than the sum of its proper divisors (39090375).

57131385 is a wasteful number, since it uses less digits than its factorization.

57131385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200488.

The product of its digits is 12600, while the sum is 33.

The square root of 57131385 is about 7558.5306111704. The cubic root of 57131385 is about 385.1455793975.

The spelling of 57131385 in words is "fifty-seven million, one hundred thirty-one thousand, three hundred eighty-five".