56139530 has 16 divisors (see below), whose sum is σ = 101947464. Its totient is φ = 22256640.

The previous prime is 56139511. The next prime is 56139539. The reversal of 56139530 is 3593165.

56139530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 35772361 + 20367169 = 5981^2 + 4513^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56139539) 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 in 7 ways as a sum of consecutive naturals, for example, 23711 + ... + 25970.

Almost surely, 2^56139530 is an apocalyptic number.

56139530 is a deficient number, since it is larger than the sum of its proper divisors (45807934).

56139530 is a wasteful number, since it uses less digits than its factorization.

56139530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49801.

The product of its (nonzero) digits is 12150, while the sum is 32.

The square root of 56139530 is about 7492.6317138907. The cubic root of 56139530 is about 382.9037245484.

The spelling of 56139530 in words is "fifty-six million, one hundred thirty-nine thousand, five hundred thirty".