564967221 has 32 divisors (see below), whose sum is σ = 939859200. Its totient is φ = 293912064.

The previous prime is 564967217. The next prime is 564967231. The reversal of 564967221 is 122769465.

It is not a de Polignac number, because 564967221 - 2² = 564967217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564967211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5755 + ... + 34103.

It is an arithmetic number, because the mean of its divisors is an integer number (29370600).

Almost surely, 2^564967221 is an apocalyptic number.

It is an amenable number.

564967221 is a deficient number, since it is larger than the sum of its proper divisors (374891979).

564967221 is a wasteful number, since it uses less digits than its factorization.

564967221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28445.

The product of its digits is 181440, while the sum is 42.

The square root of 564967221 is about 23769.0391265613. The cubic root of 564967221 is about 826.6869533227.

The spelling of 564967221 in words is "five hundred sixty-four million, nine hundred sixty-seven thousand, two hundred twenty-one".