57312477 has 6 divisors (see below), whose sum is σ = 82784702. Its totient is φ = 38208312.

The previous prime is 57312473. The next prime is 57312487. The reversal of 57312477 is 77421375.

57312477 is a `hidden beast` number, since 573 + 12 + 4 + 77 = 666.

It can be written as a sum of positive squares in only one way, i.e., 57244356 + 68121 = 7566^2 + 261^2 .

It is not a de Polignac number, because 57312477 - 2² = 57312473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57312473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3184018 + ... + 3184035.

Almost surely, 2^57312477 is an apocalyptic number.

It is an amenable number.

57312477 is a deficient number, since it is larger than the sum of its proper divisors (25472225).

57312477 is a wasteful number, since it uses less digits than its factorization.

57312477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6368059 (or 6368056 counting only the distinct ones).

The product of its digits is 41160, while the sum is 36.

The square root of 57312477 is about 7570.5004458094. The cubic root of 57312477 is about 385.5520881233.

The spelling of 57312477 in words is "fifty-seven million, three hundred twelve thousand, four hundred seventy-seven".