55731808 has 24 divisors (see below), whose sum is σ = 119697480. Its totient is φ = 25332480.

The previous prime is 55731743. The next prime is 55731839. The reversal of 55731808 is 80813755.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 78813 + ... + 79516.

It is an arithmetic number, because the mean of its divisors is an integer number (4987395).

Almost surely, 2^55731808 is an apocalyptic number.

It is an amenable number.

55731808 is an abundant number, since it is smaller than the sum of its proper divisors (63965672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55731808 is a wasteful number, since it uses less digits than its factorization.

55731808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158350 (or 158342 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 55731808 is about 7465.3739357115. The cubic root of 55731808 is about 381.9745055763.

It can be divided in two parts, 5573 and 1808, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 55731808 in words is "fifty-five million, seven hundred thirty-one thousand, eight hundred eight".