56551139 has 4 divisors (see below), whose sum is σ = 56566224. Its totient is φ = 56536056.

The previous prime is 56551111. The next prime is 56551141. The reversal of 56551139 is 93115565.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 56551139 - 2⁸ = 56550883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56551099 and 56551108.

It is not an unprimeable number, because it can be changed into a prime (56551109) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2909 + ... + 11025.

It is an arithmetic number, because the mean of its divisors is an integer number (14141556).

Almost surely, 2^56551139 is an apocalyptic number.

56551139 is a deficient number, since it is larger than the sum of its proper divisors (15085).

56551139 is an equidigital number, since it uses as much as digits as its factorization.

56551139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15084.

The product of its digits is 20250, while the sum is 35.

The square root of 56551139 is about 7520.0491354778. The cubic root of 56551139 is about 383.8372497345.

The spelling of 56551139 in words is "fifty-six million, five hundred fifty-one thousand, one hundred thirty-nine".