56569913 has 4 divisors (see below), whose sum is σ = 57205620. Its totient is φ = 55934208.

The previous prime is 56569901. The next prime is 56569927. The reversal of 56569913 is 31996565.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23541904 + 33028009 = 4852^2 + 5747^2 .

It is a cyclic number.

It is not a de Polignac number, because 56569913 - 2¹⁴ = 56553529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56569943) 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, 317720 + ... + 317897.

It is an arithmetic number, because the mean of its divisors is an integer number (14301405).

Almost surely, 2^56569913 is an apocalyptic number.

It is an amenable number.

56569913 is a deficient number, since it is larger than the sum of its proper divisors (635707).

56569913 is an equidigital number, since it uses as much as digits as its factorization.

56569913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635706.

The product of its digits is 218700, while the sum is 44.

The square root of 56569913 is about 7521.2972950150. The cubic root of 56569913 is about 383.8797208109.

It can be divided in two parts, 5 and 6569913, that multiplied together give a triangular number (32849565 = T₈₁₀₅).

The spelling of 56569913 in words is "fifty-six million, five hundred sixty-nine thousand, nine hundred thirteen".