56015138 has 4 divisors (see below), whose sum is σ = 84022710. Its totient is φ = 28007568.

The previous prime is 56015137. The next prime is 56015159. The reversal of 56015138 is 83151065.

56015138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50027329 + 5987809 = 7073^2 + 2447^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 56015138.

It is not an unprimeable number, because it can be changed into a prime (56015137) 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 as a sum of consecutive naturals, namely, 14003783 + ... + 14003786.

Almost surely, 2^56015138 is an apocalyptic number.

56015138 is a deficient number, since it is larger than the sum of its proper divisors (28007572).

56015138 is a wasteful number, since it uses less digits than its factorization.

56015138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28007571.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 56015138 is about 7484.3261553730. The cubic root of 56015138 is about 382.6207072013.

The spelling of 56015138 in words is "fifty-six million, fifteen thousand, one hundred thirty-eight".