55318865 has 16 divisors (see below), whose sum is σ = 75986688. Its totient is φ = 37872576.

The previous prime is 55318807. The next prime is 55318877. The reversal of 55318865 is 56881355.

It is not a de Polignac number, because 55318865 - 2¹⁰ = 55317841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41804 + ... + 43106.

It is an arithmetic number, because the mean of its divisors is an integer number (4749168).

Almost surely, 2^55318865 is an apocalyptic number.

It is an amenable number.

55318865 is a deficient number, since it is larger than the sum of its proper divisors (20667823).

55318865 is a wasteful number, since it uses less digits than its factorization.

55318865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2528.

The product of its digits is 144000, while the sum is 41.

The square root of 55318865 is about 7437.6652922809. The cubic root of 55318865 is about 381.0287567018.

The spelling of 55318865 in words is "fifty-five million, three hundred eighteen thousand, eight hundred sixty-five".