564440321 has 2 divisors, whose sum is σ = 564440322. Its totient is φ = 564440320.

The previous prime is 564440297. The next prime is 564440333. The reversal of 564440321 is 123044465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312900721 + 251539600 = 17689^2 + 15860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-564440321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (564440351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282220160 + 282220161.

It is an arithmetic number, because the mean of its divisors is an integer number (282220161).

Almost surely, 2^564440321 is an apocalyptic number.

It is an amenable number.

564440321 is a deficient number, since it is larger than the sum of its proper divisors (1).

564440321 is an equidigital number, since it uses as much as digits as its factorization.

564440321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 564440321 is about 23757.9527948012. The cubic root of 564440321 is about 826.4298783276.

Adding to 564440321 its reverse (123044465), we get a palindrome (687484786).

The spelling of 564440321 in words is "five hundred sixty-four million, four hundred forty thousand, three hundred twenty-one".