55361824 has 72 divisors (see below), whose sum is σ = 128495808. Its totient is φ = 22995840.

The previous prime is 55361819. The next prime is 55361833. The reversal of 55361824 is 42816355.

It is a self number, because there is not a number n which added to its sum of digits gives 55361824.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 779709 + ... + 779779.

It is an arithmetic number, because the mean of its divisors is an integer number (1784664).

Almost surely, 2^55361824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55361824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64247904).

55361824 is an abundant number, since it is smaller than the sum of its proper divisors (73133984).

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

55361824 is an equidigital number, since it uses as much as digits as its factorization.

55361824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 139 counting only the distinct ones).

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

The square root of 55361824 is about 7440.5526676451. The cubic root of 55361824 is about 381.1273630817.

The spelling of 55361824 in words is "fifty-five million, three hundred sixty-one thousand, eight hundred twenty-four".