55318624 has 24 divisors (see below), whose sum is σ = 111228768. Its totient is φ = 27070080.

The previous prime is 55318619. The next prime is 55318639. The reversal of 55318624 is 42681355.

It is a super-2 number, since 2×55318624² = 6120300322506752, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55318624.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16887 + ... + 19894.

It is an arithmetic number, because the mean of its divisors is an integer number (4634532).

Almost surely, 2^55318624 is an apocalyptic number.

It is an amenable number.

55318624 is an abundant number, since it is smaller than the sum of its proper divisors (55910144).

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

55318624 is a wasteful number, since it uses less digits than its factorization.

55318624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36838 (or 36830 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 55318624 is about 7437.6490909426. The cubic root of 55318624 is about 381.0282033760.

Adding to 55318624 its reverse (42681355), we get a palindrome (97999979).

The spelling of 55318624 in words is "fifty-five million, three hundred eighteen thousand, six hundred twenty-four".