55111816 has 16 divisors (see below), whose sum is σ = 103564800. Its totient is φ = 27494544.

The previous prime is 55111801. The next prime is 55111843. The reversal of 55111816 is 61811155.

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, 3736 + ... + 11143.

It is an arithmetic number, because the mean of its divisors is an integer number (6472800).

Almost surely, 2^55111816 is an apocalyptic number.

It is an amenable number.

55111816 is a deficient number, since it is larger than the sum of its proper divisors (48452984).

55111816 is a wasteful number, since it uses less digits than its factorization.

55111816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15348 (or 15344 counting only the distinct ones).

The product of its digits is 1200, while the sum is 28.

The square root of 55111816 is about 7423.7332926231. The cubic root of 55111816 is about 380.5527873428.

The spelling of 55111816 in words is "fifty-five million, one hundred eleven thousand, eight hundred sixteen".