55331808 has 48 divisors (see below), whose sum is σ = 165997440. Its totient is φ = 15808896.

The previous prime is 55331803. The next prime is 55331851. The reversal of 55331808 is 80813355.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55331803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40498 + ... + 41841.

It is an arithmetic number, because the mean of its divisors is an integer number (3458280).

Almost surely, 2^55331808 is an apocalyptic number.

It is an amenable number.

55331808 is an abundant number, since it is smaller than the sum of its proper divisors (110665632).

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

55331808 is a wasteful number, since it uses less digits than its factorization.

55331808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82359 (or 82351 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 55331808 is about 7438.5353397023. The cubic root of 55331808 is about 381.0584709209.

The spelling of 55331808 in words is "fifty-five million, three hundred thirty-one thousand, eight hundred eight".