55539855 has 24 divisors (see below), whose sum is σ = 110022432. Its totient is φ = 25389504.

The previous prime is 55539823. The next prime is 55539857. The reversal of 55539855 is 55893555.

55539855 is a `hidden beast` number, since 5 + 553 + 98 + 5 + 5 = 666.

It is not a de Polignac number, because 55539855 - 2⁵ = 55539823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55539855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55539857) 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, 87844 + ... + 88473.

It is an arithmetic number, because the mean of its divisors is an integer number (4584268).

Almost surely, 2^55539855 is an apocalyptic number.

55539855 is a deficient number, since it is larger than the sum of its proper divisors (54482577).

55539855 is a wasteful number, since it uses less digits than its factorization.

55539855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176335 (or 176332 counting only the distinct ones).

The product of its digits is 675000, while the sum is 45.

The square root of 55539855 is about 7452.5066252906. The cubic root of 55539855 is about 381.5354654986.

The spelling of 55539855 in words is "fifty-five million, five hundred thirty-nine thousand, eight hundred fifty-five".