56318137 has 4 divisors (see below), whose sum is σ = 56387556. Its totient is φ = 56248720.

The previous prime is 56318111. The next prime is 56318153. The reversal of 56318137 is 73181365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73181365 = 5 ⋅14636273.

It can be written as a sum of positive squares in 2 ways, for example, as 10471696 + 45846441 = 3236^2 + 6771^2 .

It is a cyclic number.

It is not a de Polignac number, because 56318137 - 2¹¹ = 56316089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56318837) 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, 33478 + ... + 35119.

It is an arithmetic number, because the mean of its divisors is an integer number (14096889).

Almost surely, 2^56318137 is an apocalyptic number.

It is an amenable number.

56318137 is a deficient number, since it is larger than the sum of its proper divisors (69419).

56318137 is an equidigital number, since it uses as much as digits as its factorization.

56318137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69418.

The product of its digits is 15120, while the sum is 34.

The square root of 56318137 is about 7504.5410918990. The cubic root of 56318137 is about 383.3093619961.

The spelling of 56318137 in words is "fifty-six million, three hundred eighteen thousand, one hundred thirty-seven".