27222564 has 12 divisors (see below), whose sum is σ = 63519344. Its totient is φ = 9074184.

The previous prime is 27222563. The next prime is 27222571. The reversal of 27222564 is 46522272.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (27222563) 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, 1134262 + ... + 1134285.

Almost surely, 2^27222564 is an apocalyptic number.

It is an amenable number.

27222564 is an abundant number, since it is smaller than the sum of its proper divisors (36296780).

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

27222564 is a wasteful number, since it uses less digits than its factorization.

27222564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268554 (or 2268552 counting only the distinct ones).

The product of its digits is 13440, while the sum is 30.

The square root of 27222564 is about 5217.5247004686. The cubic root of 27222564 is about 300.8220564642.

The spelling of 27222564 in words is "twenty-seven million, two hundred twenty-two thousand, five hundred sixty-four".