55656513 has 24 divisors (see below), whose sum is σ = 88264800. Its totient is φ = 33514560.

The previous prime is 55656511. The next prime is 55656551. The reversal of 55656513 is 31565655.

55656513 is a `hidden beast` number, since 556 + 56 + 51 + 3 = 666.

It is not a de Polignac number, because 55656513 - 2¹ = 55656511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55656511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14413 + ... + 17861.

It is an arithmetic number, because the mean of its divisors is an integer number (3677700).

Almost surely, 2^55656513 is an apocalyptic number.

It is an amenable number.

55656513 is a deficient number, since it is larger than the sum of its proper divisors (32608287).

55656513 is a wasteful number, since it uses less digits than its factorization.

55656513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629 (or 3626 counting only the distinct ones).

The product of its digits is 67500, while the sum is 36.

The square root of 55656513 is about 7460.3292822770. The cubic root of 55656513 is about 381.8024091660.

It can be divided in two parts, 55656 and 513, that added together give a square (56169 = 237²).

The spelling of 55656513 in words is "fifty-five million, six hundred fifty-six thousand, five hundred thirteen".