56331139 has 4 divisors (see below), whose sum is σ = 56415024. Its totient is φ = 56247256.

The previous prime is 56331133. The next prime is 56331151. The reversal of 56331139 is 93113365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93113365 = 5 ⋅18622673.

It is a cyclic number.

It is not a de Polignac number, because 56331139 - 2²¹ = 54233987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56331139.

It is not an unprimeable number, because it can be changed into a prime (56331133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40927 + ... + 42280.

It is an arithmetic number, because the mean of its divisors is an integer number (14103756).

Almost surely, 2^56331139 is an apocalyptic number.

56331139 is a deficient number, since it is larger than the sum of its proper divisors (83885).

56331139 is an equidigital number, since it uses as much as digits as its factorization.

56331139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83884.

The product of its digits is 7290, while the sum is 31.

The square root of 56331139 is about 7505.4073173946. The cubic root of 56331139 is about 383.3388575553.

The spelling of 56331139 in words is "fifty-six million, three hundred thirty-one thousand, one hundred thirty-nine".