55118087 has 4 divisors (see below), whose sum is σ = 55514760. Its totient is φ = 54721416.

The previous prime is 55118071. The next prime is 55118099. The reversal of 55118087 is 78081155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78081155 = 5 ⋅15616231.

It is a cyclic number.

It is not a de Polignac number, because 55118087 - 2⁴ = 55118071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55118047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198128 + ... + 198405.

It is an arithmetic number, because the mean of its divisors is an integer number (13878690).

Almost surely, 2^55118087 is an apocalyptic number.

55118087 is a deficient number, since it is larger than the sum of its proper divisors (396673).

55118087 is a wasteful number, since it uses less digits than its factorization.

55118087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396672.

The product of its (nonzero) digits is 11200, while the sum is 35.

The square root of 55118087 is about 7424.1556422263. The cubic root of 55118087 is about 380.5672207631.

The spelling of 55118087 in words is "fifty-five million, one hundred eighteen thousand, eighty-seven".