561564313 has 4 divisors (see below), whose sum is σ = 561995280. Its totient is φ = 561133348.

The previous prime is 561564307. The next prime is 561564329. The reversal of 561564313 is 313465165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561564313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561564713) 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, 213523 + ... + 216136.

It is an arithmetic number, because the mean of its divisors is an integer number (140498820).

Almost surely, 2^561564313 is an apocalyptic number.

It is an amenable number.

561564313 is a deficient number, since it is larger than the sum of its proper divisors (430967).

561564313 is a wasteful number, since it uses less digits than its factorization.

561564313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430966.

The product of its digits is 32400, while the sum is 34.

The square root of 561564313 is about 23697.3482271751. The cubic root of 561564313 is about 825.0238440614.

The spelling of 561564313 in words is "five hundred sixty-one million, five hundred sixty-four thousand, three hundred thirteen".