55111560 has 64 divisors (see below), whose sum is σ = 188956800. Its totient is φ = 12596736.

The previous prime is 55111541. The next prime is 55111561. The reversal of 55111560 is 6511155.

55111560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 55111560.

It is not an unprimeable number, because it can be changed into a prime (55111561) 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 15 ways as a sum of consecutive naturals, for example, 31965 + ... + 33644.

It is an arithmetic number, because the mean of its divisors is an integer number (2952450).

Almost surely, 2^55111560 is an apocalyptic number.

It is an amenable number.

55111560 is an abundant number, since it is smaller than the sum of its proper divisors (133845240).

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

55111560 is a wasteful number, since it uses less digits than its factorization.

55111560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65630 (or 65626 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 55111560 is about 7423.7160506043. The cubic root of 55111560 is about 380.5521981064.

The spelling of 55111560 in words is "fifty-five million, one hundred eleven thousand, five hundred sixty".