564448021 has 2 divisors, whose sum is σ = 564448022. Its totient is φ = 564448020.

The previous prime is 564448019. The next prime is 564448033. The reversal of 564448021 is 120844465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 506475025 + 57972996 = 22505^2 + 7614^2 .

It is a cyclic number.

It is not a de Polignac number, because 564448021 - 2¹ = 564448019 is a prime.

Together with 564448019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564448081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282224010 + 282224011.

It is an arithmetic number, because the mean of its divisors is an integer number (282224011).

Almost surely, 2^564448021 is an apocalyptic number.

It is an amenable number.

564448021 is a deficient number, since it is larger than the sum of its proper divisors (1).

564448021 is an equidigital number, since it uses as much as digits as its factorization.

564448021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 564448021 is about 23758.1148452481. The cubic root of 564448021 is about 826.4336363164.

The spelling of 564448021 in words is "five hundred sixty-four million, four hundred forty-eight thousand, twenty-one".