55522881 has 8 divisors (see below), whose sum is σ = 82256160. Its totient is φ = 37015236.

The previous prime is 55522843. The next prime is 55522931. The reversal of 55522881 is 18822555.

55522881 is a `hidden beast` number, since 5 + 552 + 28 + 81 = 666.

55522881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55522881 - 2²² = 51328577 is a prime.

It is a super-2 number, since 2×55522881² = 6165580629080322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55522811) by changing a digit.

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, 1028175 + ... + 1028228.

It is an arithmetic number, because the mean of its divisors is an integer number (10282020).

Almost surely, 2^55522881 is an apocalyptic number.

It is an amenable number.

55522881 is a deficient number, since it is larger than the sum of its proper divisors (26733279).

55522881 is a wasteful number, since it uses less digits than its factorization.

55522881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056412 (or 2056406 counting only the distinct ones).

The product of its digits is 32000, while the sum is 36.

The square root of 55522881 is about 7451.3677268002. The cubic root of 55522881 is about 381.4965934559.

It can be divided in two parts, 555 and 22881, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 55522881 in words is "fifty-five million, five hundred twenty-two thousand, eight hundred eighty-one".