55166172 has 24 divisors (see below), whose sum is σ = 128841216. Its totient is φ = 18371568.

The previous prime is 55166147. The next prime is 55166179. The reversal of 55166172 is 27166155.

55166172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55166179) 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 7 ways as a sum of consecutive naturals, for example, 23893 + ... + 26099.

It is an arithmetic number, because the mean of its divisors is an integer number (5368384).

Almost surely, 2^55166172 is an apocalyptic number.

It is an amenable number.

55166172 is an abundant number, since it is smaller than the sum of its proper divisors (73675044).

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

55166172 is a wasteful number, since it uses less digits than its factorization.

55166172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4297 (or 4295 counting only the distinct ones).

The product of its digits is 12600, while the sum is 33.

The square root of 55166172 is about 7427.3933516409. The cubic root of 55166172 is about 380.6778575001.

The spelling of 55166172 in words is "fifty-five million, one hundred sixty-six thousand, one hundred seventy-two".