55572690 has 32 divisors (see below), whose sum is σ = 135639360. Its totient is φ = 14567744.

The previous prime is 55572683. The next prime is 55572691. The reversal of 55572690 is 9627555.

It is a super-2 number, since 2×55572690² = 6176647747672200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55572691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13929 + ... + 17468.

It is an arithmetic number, because the mean of its divisors is an integer number (4238730).

Almost surely, 2^55572690 is an apocalyptic number.

55572690 is an abundant number, since it is smaller than the sum of its proper divisors (80066670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55572690 is a wasteful number, since it uses less digits than its factorization.

55572690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31466.

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 55572690 is about 7454.7092498635. The cubic root of 55572690 is about 381.6106382374.

The spelling of 55572690 in words is "fifty-five million, five hundred seventy-two thousand, six hundred ninety".