564940321 has 16 divisors (see below), whose sum is σ = 632351808. Its totient is φ = 500270400.

The previous prime is 564940301. The next prime is 564940333. The reversal of 564940321 is 123049465.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 564940321 - 2²⁹ = 28069409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (564940301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197715 + ... + 200551.

It is an arithmetic number, because the mean of its divisors is an integer number (39521988).

Almost surely, 2^564940321 is an apocalyptic number.

It is an amenable number.

564940321 is a deficient number, since it is larger than the sum of its proper divisors (67411487).

564940321 is a wasteful number, since it uses less digits than its factorization.

564940321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3312.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 564940321 is about 23768.4732576579. The cubic root of 564940321 is about 826.6738326606.

Adding to 564940321 its reverse (123049465), we get a palindrome (687989786).

The spelling of 564940321 in words is "five hundred sixty-four million, nine hundred forty thousand, three hundred twenty-one".