57157191 has 64 divisors (see below), whose sum is σ = 106839040. Its totient is φ = 29393280.

The previous prime is 57157181. The next prime is 57157223. The reversal of 57157191 is 19175175.

It is not a de Polignac number, because 57157191 - 2⁶ = 57157127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57157171) 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, 105381 + ... + 105921.

It is an arithmetic number, because the mean of its divisors is an integer number (1669360).

Almost surely, 2^57157191 is an apocalyptic number.

57157191 is a deficient number, since it is larger than the sum of its proper divisors (49681849).

57157191 is a wasteful number, since it uses less digits than its factorization.

57157191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 607 counting only the distinct ones).

The product of its digits is 11025, while the sum is 36.

The square root of 57157191 is about 7560.2374962695. The cubic root of 57157191 is about 385.2035602004.

The spelling of 57157191 in words is "fifty-seven million, one hundred fifty-seven thousand, one hundred ninety-one".