56642157 has 36 divisors (see below), whose sum is σ = 96872412. Its totient is φ = 31680000.

The previous prime is 56642149. The next prime is 56642171. The reversal of 56642157 is 75124665.

It is a happy number.

56642157 is a `hidden beast` number, since 5 + 6 + 642 + 1 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4888521 + 51753636 = 2211^2 + 7194^2 .

It is not a de Polignac number, because 56642157 - 2³ = 56642149 is a prime.

It is a super-2 number, since 2×56642157² = 6416667899225298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56642357) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12157 + ... + 16157.

Almost surely, 2^56642157 is an apocalyptic number.

It is an amenable number.

56642157 is a deficient number, since it is larger than the sum of its proper divisors (40230255).

56642157 is a wasteful number, since it uses less digits than its factorization.

56642157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042 (or 4028 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 56642157 is about 7526.0983915971. The cubic root of 56642157 is about 384.0430656453.

The spelling of 56642157 in words is "fifty-six million, six hundred forty-two thousand, one hundred fifty-seven".