564475221 has 6 divisors (see below), whose sum is σ = 815353110. Its totient is φ = 376316808.

The previous prime is 564475213. The next prime is 564475231. The reversal of 564475221 is 122574465.

It is a happy number.

564475221 is a `hidden beast` number, since 5 + 644 + 7 + 5 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 473062500 + 91412721 = 21750^2 + 9561^2 .

It is not a de Polignac number, because 564475221 - 2³ = 564475213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564475211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31359726 + ... + 31359743.

It is an arithmetic number, because the mean of its divisors is an integer number (135892185).

Almost surely, 2^564475221 is an apocalyptic number.

It is an amenable number.

564475221 is a deficient number, since it is larger than the sum of its proper divisors (250877889).

564475221 is a wasteful number, since it uses less digits than its factorization.

564475221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62719475 (or 62719472 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 564475221 is about 23758.6872743424. The cubic root of 564475221 is about 826.4469110160.

The spelling of 564475221 in words is "five hundred sixty-four million, four hundred seventy-five thousand, two hundred twenty-one".