55613999 has 16 divisors (see below), whose sum is σ = 65753856. Its totient is φ = 46046400.

The previous prime is 55613981. The next prime is 55614001. The reversal of 55613999 is 99931655.

55613999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55613999 - 2⁸ = 55613743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55613599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29804 + ... + 31614.

It is an arithmetic number, because the mean of its divisors is an integer number (4109616).

Almost surely, 2^55613999 is an apocalyptic number.

55613999 is a deficient number, since it is larger than the sum of its proper divisors (10139857).

55613999 is a wasteful number, since it uses less digits than its factorization.

55613999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966.

The product of its digits is 328050, while the sum is 47.

The square root of 55613999 is about 7457.4793999045. The cubic root of 55613999 is about 381.7051693792.

The spelling of 55613999 in words is "fifty-five million, six hundred thirteen thousand, nine hundred ninety-nine".