564245621 has 2 divisors, whose sum is σ = 564245622. Its totient is φ = 564245620.

The previous prime is 564245593. The next prime is 564245651. The reversal of 564245621 is 126542465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502387396 + 61858225 = 22414^2 + 7865^2 .

It is a cyclic number.

It is not a de Polignac number, because 564245621 - 2⁶ = 564245557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564245651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282122810 + 282122811.

It is an arithmetic number, because the mean of its divisors is an integer number (282122811).

Almost surely, 2^564245621 is an apocalyptic number.

It is an amenable number.

564245621 is a deficient number, since it is larger than the sum of its proper divisors (1).

564245621 is an equidigital number, since it uses as much as digits as its factorization.

564245621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 35.

The square root of 564245621 is about 23753.8548661054. The cubic root of 564245621 is about 826.3348435377.

The spelling of 564245621 in words is "five hundred sixty-four million, two hundred forty-five thousand, six hundred twenty-one".