55421924 has 12 divisors (see below), whose sum is σ = 100117248. Its totient is φ = 26817000.

The previous prime is 55421923. The next prime is 55421953. The reversal of 55421924 is 42912455.

It is not an unprimeable number, because it can be changed into a prime (55421923) 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, 223352 + ... + 223599.

It is an arithmetic number, because the mean of its divisors is an integer number (8343104).

Almost surely, 2^55421924 is an apocalyptic number.

It is an amenable number.

55421924 is a deficient number, since it is larger than the sum of its proper divisors (44695324).

55421924 is a wasteful number, since it uses less digits than its factorization.

55421924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446986 (or 446984 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 55421924 is about 7444.5902506451. The cubic root of 55421924 is about 381.2652286670.

The spelling of 55421924 in words is "fifty-five million, four hundred twenty-one thousand, nine hundred twenty-four".