55118918 has 4 divisors (see below), whose sum is σ = 82678380. Its totient is φ = 27559458.

The previous prime is 55118911. The next prime is 55118923. The reversal of 55118918 is 81981155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55118911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13779728 + ... + 13779731.

It is an arithmetic number, because the mean of its divisors is an integer number (20669595).

Almost surely, 2^55118918 is an apocalyptic number.

55118918 is a deficient number, since it is larger than the sum of its proper divisors (27559462).

55118918 is a wasteful number, since it uses less digits than its factorization.

55118918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27559461.

The product of its digits is 14400, while the sum is 38.

The square root of 55118918 is about 7424.2116079756. The cubic root of 55118918 is about 380.5691333221.

The spelling of 55118918 in words is "fifty-five million, one hundred eighteen thousand, nine hundred eighteen".