57097557 has 12 divisors (see below), whose sum is σ = 89972064. Its totient is φ = 34604520.

The previous prime is 57097553. The next prime is 57097559. The reversal of 57097557 is 75579075.

57097557 is a `hidden beast` number, since 5 + 7 + 0 + 97 + 557 = 666.

It is not a de Polignac number, because 57097557 - 2² = 57097553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57097553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 288273 + ... + 288470.

It is an arithmetic number, because the mean of its divisors is an integer number (7497672).

Almost surely, 2^57097557 is an apocalyptic number.

It is an amenable number.

57097557 is a deficient number, since it is larger than the sum of its proper divisors (32874507).

57097557 is a wasteful number, since it uses less digits than its factorization.

57097557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576760 (or 576757 counting only the distinct ones).

The product of its (nonzero) digits is 385875, while the sum is 45.

The square root of 57097557 is about 7556.2925433046. The cubic root of 57097557 is about 385.0695483510.

The spelling of 57097557 in words is "fifty-seven million, ninety-seven thousand, five hundred fifty-seven".