57138171 has 4 divisors (see below), whose sum is σ = 76184232. Its totient is φ = 38092112.

The previous prime is 57138143. The next prime is 57138181. The reversal of 57138171 is 17183175.

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

It is a cyclic number.

It is not a de Polignac number, because 57138171 - 2⁷ = 57138043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57138121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9523026 + ... + 9523031.

It is an arithmetic number, because the mean of its divisors is an integer number (19046058).

Almost surely, 2^57138171 is an apocalyptic number.

57138171 is a deficient number, since it is larger than the sum of its proper divisors (19046061).

57138171 is a wasteful number, since it uses less digits than its factorization.

57138171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19046060.

The product of its digits is 5880, while the sum is 33.

The square root of 57138171 is about 7558.9794946143. The cubic root of 57138171 is about 385.1608278430.

The spelling of 57138171 in words is "fifty-seven million, one hundred thirty-eight thousand, one hundred seventy-one".