55521924 has 12 divisors (see below), whose sum is σ = 129551184. Its totient is φ = 18507304.

The previous prime is 55521923. The next prime is 55521943. The reversal of 55521924 is 42912555.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (55521923) 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, 2313402 + ... + 2313425.

It is an arithmetic number, because the mean of its divisors is an integer number (10795932).

Almost surely, 2^55521924 is an apocalyptic number.

It is an amenable number.

55521924 is an abundant number, since it is smaller than the sum of its proper divisors (74029260).

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

55521924 is a wasteful number, since it uses less digits than its factorization.

55521924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626834 (or 4626832 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

The square root of 55521924 is about 7451.3035101249. The cubic root of 55521924 is about 381.4944016007.

The spelling of 55521924 in words is "fifty-five million, five hundred twenty-one thousand, nine hundred twenty-four".