57158172 has 36 divisors (see below), whose sum is σ = 149146816. Its totient is φ = 18437760.

The previous prime is 57158161. The next prime is 57158177. The reversal of 57158172 is 27185175.

57158172 is a `hidden beast` number, since 5 + 7 + 1 + 581 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57158177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24493 + ... + 26724.

Almost surely, 2^57158172 is an apocalyptic number.

It is an amenable number.

57158172 is an abundant number, since it is smaller than the sum of its proper divisors (91988644).

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

57158172 is a wasteful number, since it uses less digits than its factorization.

57158172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51258 (or 51253 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 57158172 is about 7560.3023749054. The cubic root of 57158172 is about 385.2057639624.

The spelling of 57158172 in words is "fifty-seven million, one hundred fifty-eight thousand, one hundred seventy-two".