55165872 has 40 divisors (see below), whose sum is σ = 142800880. Its totient is φ = 18351360.

The previous prime is 55165823. The next prime is 55165907. The reversal of 55165872 is 27856155.

It is a self number, because there is not a number n which added to its sum of digits gives 55165872.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33222 + ... + 34842.

It is an arithmetic number, because the mean of its divisors is an integer number (3570022).

Almost surely, 2^55165872 is an apocalyptic number.

It is an amenable number.

55165872 is an abundant number, since it is smaller than the sum of its proper divisors (87635008).

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

55165872 is a wasteful number, since it uses less digits than its factorization.

55165872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341 (or 2335 counting only the distinct ones).

The product of its digits is 84000, while the sum is 39.

The square root of 55165872 is about 7427.3731561030. The cubic root of 55165872 is about 380.6771674421.

The spelling of 55165872 in words is "fifty-five million, one hundred sixty-five thousand, eight hundred seventy-two".