215222564 has 12 divisors (see below), whose sum is σ = 377927004. Its totient is φ = 107243424.

The previous prime is 215222563. The next prime is 215222573. The reversal of 215222564 is 465222512.

It can be written as a sum of positive squares in 2 ways, for example, as 127012900 + 88209664 = 11270^2 + 9392^2 .

It is not an unprimeable number, because it can be changed into a prime (215222561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90647 + ... + 92990.

It is an arithmetic number, because the mean of its divisors is an integer number (31493917).

Almost surely, 2^215222564 is an apocalyptic number.

It is an amenable number.

215222564 is a deficient number, since it is larger than the sum of its proper divisors (162704440).

215222564 is a wasteful number, since it uses less digits than its factorization.

215222564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183934 (or 183932 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 215222564 is about 14670.4657049461. The cubic root of 215222564 is about 599.2792864852.

The spelling of 215222564 in words is "two hundred fifteen million, two hundred twenty-two thousand, five hundred sixty-four".