222147564 has 12 divisors (see below), whose sum is σ = 518344344. Its totient is φ = 74049184.

The previous prime is 222147533. The next prime is 222147571. The reversal of 222147564 is 465741222.

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

It is a super-2 number, since 2×222147564² = 98699080382268192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9256137 + ... + 9256160.

It is an arithmetic number, because the mean of its divisors is an integer number (43195362).

Almost surely, 2^222147564 is an apocalyptic number.

It is an amenable number.

222147564 is an abundant number, since it is smaller than the sum of its proper divisors (296196780).

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

222147564 is a wasteful number, since it uses less digits than its factorization.

222147564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18512304 (or 18512302 counting only the distinct ones).

The product of its digits is 26880, while the sum is 33.

The square root of 222147564 is about 14904.6155267420. The cubic root of 222147564 is about 605.6390251832.

Adding to 222147564 its reverse (465741222), we get a palindrome (687888786).

The spelling of 222147564 in words is "two hundred twenty-two million, one hundred forty-seven thousand, five hundred sixty-four".