55657072 has 20 divisors (see below), whose sum is σ = 108626976. Its totient is φ = 27624320.

The previous prime is 55657067. The next prime is 55657073. The reversal of 55657072 is 27075655.

It is a super-2 number, since 2×55657072² = 6195419327226368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55657073) 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, 10504 + ... + 14887.

Almost surely, 2^55657072 is an apocalyptic number.

It is an amenable number.

55657072 is a deficient number, since it is larger than the sum of its proper divisors (52969904).

55657072 is a wasteful number, since it uses less digits than its factorization.

55657072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25536 (or 25530 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 37.

The square root of 55657072 is about 7460.3667470172. The cubic root of 55657072 is about 381.8036874042.

The spelling of 55657072 in words is "fifty-five million, six hundred fifty-seven thousand, seventy-two".