56266013 has 4 divisors (see below), whose sum is σ = 56288220. Its totient is φ = 56243808.

The previous prime is 56265983. The next prime is 56266031. The reversal of 56266013 is 31066265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31066265 = 5 ⋅6213253.

It can be written as a sum of positive squares in 2 ways, for example, as 51008164 + 5257849 = 7142^2 + 2293^2 .

It is a cyclic number.

It is not a de Polignac number, because 56266013 - 2¹² = 56261917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56266313) 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, 6728 + ... + 12561.

It is an arithmetic number, because the mean of its divisors is an integer number (14072055).

Almost surely, 2^56266013 is an apocalyptic number.

It is an amenable number.

56266013 is a deficient number, since it is larger than the sum of its proper divisors (22207).

56266013 is a wasteful number, since it uses less digits than its factorization.

56266013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22206.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 56266013 is about 7501.0674573690. The cubic root of 56266013 is about 383.1910710078.

The spelling of 56266013 in words is "fifty-six million, two hundred sixty-six thousand, thirteen".