55031688 has 48 divisors (see below), whose sum is σ = 149385600. Its totient is φ = 18301920.

The previous prime is 55031653. The next prime is 55031693. The reversal of 55031688 is 88613055.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59953 + ... + 60863.

It is an arithmetic number, because the mean of its divisors is an integer number (3112200).

Almost surely, 2^55031688 is an apocalyptic number.

It is an amenable number.

55031688 is an abundant number, since it is smaller than the sum of its proper divisors (94353912).

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

55031688 is a wasteful number, since it uses less digits than its factorization.

55031688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 55031688 is about 7418.3345839885. The cubic root of 55031688 is about 380.3682671801.

The spelling of 55031688 in words is "fifty-five million, thirty-one thousand, six hundred eighty-eight".