57157 has 4 divisors (see below), whose sum is σ = 58156. Its totient is φ = 56160.

The previous prime is 57149. The next prime is 57163. The reversal of 57157 is 75175.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2401 + 54756 = 49^2 + 234^2 .

It is a cyclic number.

It is not a de Polignac number, because 57157 - 2³ = 57149 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 (57107) 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, 408 + ... + 529.

It is an arithmetic number, because the mean of its divisors is an integer number (14539).

2⁵⁷¹⁵⁷ is an apocalyptic number.

It is an amenable number.

57157 is a deficient number, since it is larger than the sum of its proper divisors (999).

57157 is an equidigital number, since it uses as much as digits as its factorization.

57157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998.

The product of its digits is 1225, while the sum is 25.

The square root of 57157 is about 239.0753019448. The cubic root of 57157 is about 38.5203131127.

The spelling of 57157 in words is "fifty-seven thousand, one hundred fifty-seven".