55111164 has 12 divisors (see below), whose sum is σ = 128592744. Its totient is φ = 18370384.

The previous prime is 55111159. The next prime is 55111171. The reversal of 55111164 is 46111155.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2296287 + ... + 2296310.

It is an arithmetic number, because the mean of its divisors is an integer number (10716062).

Almost surely, 2^55111164 is an apocalyptic number.

It is an amenable number.

55111164 is an abundant number, since it is smaller than the sum of its proper divisors (73481580).

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

55111164 is a wasteful number, since it uses less digits than its factorization.

55111164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4592604 (or 4592602 counting only the distinct ones).

The product of its digits is 600, while the sum is 24.

The square root of 55111164 is about 7423.6893792777. The cubic root of 55111164 is about 380.5512866277.

Subtracting from 55111164 its reverse (46111155), we obtain a palindrome (9000009).

The spelling of 55111164 in words is "fifty-five million, one hundred eleven thousand, one hundred sixty-four".