55311858 has 24 divisors (see below), whose sum is σ = 136963008. Its totient is φ = 15803352.

The previous prime is 55311857. The next prime is 55311871. The reversal of 55311858 is 85811355.

It is not an unprimeable number, because it can be changed into a prime (55311857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219366 + ... + 219617.

It is an arithmetic number, because the mean of its divisors is an integer number (5706792).

Almost surely, 2^55311858 is an apocalyptic number.

55311858 is an abundant number, since it is smaller than the sum of its proper divisors (81651150).

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

55311858 is a wasteful number, since it uses less digits than its factorization.

55311858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438998 (or 438995 counting only the distinct ones).

The product of its digits is 24000, while the sum is 36.

The square root of 55311858 is about 7437.1942290087. The cubic root of 55311858 is about 381.0126682708.

It can be divided in two parts, 55311 and 858, that added together give a square (56169 = 237²).

The spelling of 55311858 in words is "fifty-five million, three hundred eleven thousand, eight hundred fifty-eight".