55318689 has 12 divisors (see below), whose sum is σ = 82660500. Its totient is φ = 35607264.

The previous prime is 55318687. The next prime is 55318729. The reversal of 55318689 is 98681355.

55318689 is a `hidden beast` number, since 553 + 18 + 6 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 35605089 + 19713600 = 5967^2 + 4440^2 .

It is not a de Polignac number, because 55318689 - 2¹ = 55318687 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55318687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105714 + ... + 106235.

It is an arithmetic number, because the mean of its divisors is an integer number (6888375).

Almost surely, 2^55318689 is an apocalyptic number.

It is an amenable number.

55318689 is a deficient number, since it is larger than the sum of its proper divisors (27341811).

55318689 is a wasteful number, since it uses less digits than its factorization.

55318689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211984 (or 211981 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 55318689 is about 7437.6534606017. The cubic root of 55318689 is about 381.0283526134.

The spelling of 55318689 in words is "fifty-five million, three hundred eighteen thousand, six hundred eighty-nine".