55315018 has 16 divisors (see below), whose sum is σ = 91609056. Its totient is φ = 24839440.

The previous prime is 55315003. The next prime is 55315019. The reversal of 55315018 is 81051355.

It is not an unprimeable number, because it can be changed into a prime (55315019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13321 + ... + 16972.

It is an arithmetic number, because the mean of its divisors is an integer number (5725566).

Almost surely, 2^55315018 is an apocalyptic number.

55315018 is a deficient number, since it is larger than the sum of its proper divisors (36294038).

55315018 is a wasteful number, since it uses less digits than its factorization.

55315018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30389.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 55315018 is about 7437.4066716833. The cubic root of 55315018 is about 381.0199239609.

The spelling of 55315018 in words is "fifty-five million, three hundred fifteen thousand, eighteen".