57172479 has 64 divisors (see below), whose sum is σ = 101154816. Its totient is φ = 27869184.

The previous prime is 57172469. The next prime is 57172481. The reversal of 57172479 is 97427175.

It is not a de Polignac number, because 57172479 - 2⁸ = 57172223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57172479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57172439) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 450114 + ... + 450240.

It is an arithmetic number, because the mean of its divisors is an integer number (1580544).

Almost surely, 2^57172479 is an apocalyptic number.

57172479 is a deficient number, since it is larger than the sum of its proper divisors (43982337).

57172479 is a wasteful number, since it uses less digits than its factorization.

57172479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264.

The product of its digits is 123480, while the sum is 42.

The square root of 57172479 is about 7561.2485080177. The cubic root of 57172479 is about 385.2379009774.

The spelling of 57172479 in words is "fifty-seven million, one hundred seventy-two thousand, four hundred seventy-nine".