56055138 has 8 divisors (see below), whose sum is σ = 112110288. Its totient is φ = 18685044.

The previous prime is 56055091. The next prime is 56055143. The reversal of 56055138 is 83155065.

It is a sphenic number, since it is the product of 3 distinct primes.

56055138 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 56055099 and 56055108.

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, 4671256 + ... + 4671267.

It is an arithmetic number, because the mean of its divisors is an integer number (14013786).

Almost surely, 2^56055138 is an apocalyptic number.

56055138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

56055138 is a wasteful number, since it uses less digits than its factorization.

56055138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9342528.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 56055138 is about 7486.9979297446. The cubic root of 56055138 is about 382.7117610798.

The spelling of 56055138 in words is "fifty-six million, fifty-five thousand, one hundred thirty-eight".