564221620 has 12 divisors (see below), whose sum is σ = 1184865444. Its totient is φ = 225688640.

The previous prime is 564221611. The next prime is 564221657. The reversal of 564221620 is 26122465.

It can be written as a sum of positive squares in 2 ways, for example, as 437479056 + 126742564 = 20916^2 + 11258^2 .

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 14105521 + ... + 14105560.

It is an arithmetic number, because the mean of its divisors is an integer number (98738787).

Almost surely, 2^564221620 is an apocalyptic number.

It is an amenable number.

564221620 is an abundant number, since it is smaller than the sum of its proper divisors (620643824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

564221620 is a wasteful number, since it uses less digits than its factorization.

564221620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28211090 (or 28211088 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 564221620 is about 23753.3496585218. The cubic root of 564221620 is about 826.3231269241.

The spelling of 564221620 in words is "five hundred sixty-four million, two hundred twenty-one thousand, six hundred twenty".