55431624 has 32 divisors (see below), whose sum is σ = 142326720. Its totient is φ = 17977536.

The previous prime is 55431619. The next prime is 55431637. The reversal of 55431624 is 42613455.

55431624 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 55431591 and 55431600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30324 + ... + 32099.

It is an arithmetic number, because the mean of its divisors is an integer number (4447710).

Almost surely, 2^55431624 is an apocalyptic number.

It is an amenable number.

55431624 is an abundant number, since it is smaller than the sum of its proper divisors (86895096).

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

55431624 is a wasteful number, since it uses less digits than its factorization.

55431624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62469 (or 62465 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 55431624 is about 7445.2417019194. The cubic root of 55431624 is about 381.2874705087.

The spelling of 55431624 in words is "fifty-five million, four hundred thirty-one thousand, six hundred twenty-four".