55120056 has 32 divisors (see below), whose sum is σ = 139226640. Its totient is φ = 18183168.

The previous prime is 55120003. The next prime is 55120061. The reversal of 55120056 is 65002155.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 9511 + ... + 14166.

Almost surely, 2^55120056 is an apocalyptic number.

It is an amenable number.

55120056 is an abundant number, since it is smaller than the sum of its proper divisors (84106584).

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

55120056 is a wasteful number, since it uses less digits than its factorization.

55120056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23783 (or 23779 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 55120056 is about 7424.2882487145. The cubic root of 55120056 is about 380.5717524149.

The spelling of 55120056 in words is "fifty-five million, one hundred twenty thousand, fifty-six".