55399264 has 12 divisors (see below), whose sum is σ = 109067364. Its totient is φ = 27699616.

The previous prime is 55399259. The next prime is 55399297. The reversal of 55399264 is 46299355.

It is a self number, because there is not a number n which added to its sum of digits gives 55399264.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 865582 + ... + 865645.

It is an arithmetic number, because the mean of its divisors is an integer number (9088947).

Almost surely, 2^55399264 is an apocalyptic number.

It is an amenable number.

55399264 is a deficient number, since it is larger than the sum of its proper divisors (53668100).

55399264 is a wasteful number, since it uses less digits than its factorization.

55399264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731237 (or 1731229 counting only the distinct ones).

The product of its digits is 291600, while the sum is 43.

The square root of 55399264 is about 7443.0681845594. The cubic root of 55399264 is about 381.2132597759.

Subtracting from 55399264 its reverse (46299355), we obtain a palindrome (9099909).

The spelling of 55399264 in words is "fifty-five million, three hundred ninety-nine thousand, two hundred sixty-four".