57372157 has 4 divisors (see below), whose sum is σ = 57469500. Its totient is φ = 57274816.

The previous prime is 57372151. The next prime is 57372181. The reversal of 57372157 is 75127375.

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 44368921 + 13003236 = 6661^2 + 3606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57372157 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 (57372151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47782 + ... + 48967.

It is an arithmetic number, because the mean of its divisors is an integer number (14367375).

Almost surely, 2^57372157 is an apocalyptic number.

It is an amenable number.

57372157 is a deficient number, since it is larger than the sum of its proper divisors (97343).

57372157 is an equidigital number, since it uses as much as digits as its factorization.

57372157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97342.

The product of its digits is 51450, while the sum is 37.

The square root of 57372157 is about 7574.4410354824. The cubic root of 57372157 is about 385.6858679893.

The spelling of 57372157 in words is "fifty-seven million, three hundred seventy-two thousand, one hundred fifty-seven".