55331788 has 12 divisors (see below), whose sum is σ = 98658000. Its totient is φ = 27143792.

The previous prime is 55331777. The next prime is 55331789. The reversal of 55331788 is 88713355.

55331788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55331788.

It is not an unprimeable number, because it can be changed into a prime (55331789) 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 3 ways as a sum of consecutive naturals, for example, 130288 + ... + 130711.

It is an arithmetic number, because the mean of its divisors is an integer number (8221500).

Almost surely, 2^55331788 is an apocalyptic number.

It is an amenable number.

55331788 is a deficient number, since it is larger than the sum of its proper divisors (43326212).

55331788 is a wasteful number, since it uses less digits than its factorization.

55331788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261056 (or 261054 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 55331788 is about 7438.5339953515. The cubic root of 55331788 is about 381.0584250090.

The spelling of 55331788 in words is "fifty-five million, three hundred thirty-one thousand, seven hundred eighty-eight".