564695221 has 16 divisors (see below), whose sum is σ = 613958400. Its totient is φ = 518107968.

The previous prime is 564695207. The next prime is 564695227. The reversal of 564695221 is 122596465.

It is not a de Polignac number, because 564695221 - 2⁷ = 564695093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564695227) 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, 40020 + ... + 52258.

It is an arithmetic number, because the mean of its divisors is an integer number (38372400).

Almost surely, 2^564695221 is an apocalyptic number.

It is an amenable number.

564695221 is a deficient number, since it is larger than the sum of its proper divisors (49263179).

564695221 is a wasteful number, since it uses less digits than its factorization.

564695221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12348.

The product of its digits is 129600, while the sum is 40.

The square root of 564695221 is about 23763.3167087425. The cubic root of 564695221 is about 826.5542642402.

The spelling of 564695221 in words is "five hundred sixty-four million, six hundred ninety-five thousand, two hundred twenty-one".