55157120 has 32 divisors (see below), whose sum is σ = 131861520. Its totient is φ = 22062592.

The previous prime is 55157117. The next prime is 55157189. The reversal of 55157120 is 2175155.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 55157120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42452 + ... + 43731.

Almost surely, 2^55157120 is an apocalyptic number.

It is an amenable number.

55157120 is an abundant number, since it is smaller than the sum of its proper divisors (76704400).

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

55157120 is an equidigital number, since it uses as much as digits as its factorization.

55157120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86202 (or 86190 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 55157120 is about 7426.7839607733. The cubic root of 55157120 is about 380.6570350508.

The spelling of 55157120 in words is "fifty-five million, one hundred fifty-seven thousand, one hundred twenty".