56081138 has 4 divisors (see below), whose sum is σ = 84121710. Its totient is φ = 28040568.

The previous prime is 56081119. The next prime is 56081167. The reversal of 56081138 is 83118065.

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., 55995289 + 85849 = 7483^2 + 293^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14020283 + ... + 14020286.

Almost surely, 2^56081138 is an apocalyptic number.

56081138 is a deficient number, since it is larger than the sum of its proper divisors (28040572).

56081138 is a wasteful number, since it uses less digits than its factorization.

56081138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28040571.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 56081138 is about 7488.7340719243. The cubic root of 56081138 is about 382.7709228747.

The spelling of 56081138 in words is "fifty-six million, eighty-one thousand, one hundred thirty-eight".