22139564 has 6 divisors (see below), whose sum is σ = 38744244. Its totient is φ = 11069780.

The previous prime is 22139563. The next prime is 22139567. The reversal of 22139564 is 46593122.

It is a happy number.

It is a super-2 number, since 2×22139564² = 980320588220192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22139564.

It is not an unprimeable number, because it can be changed into a prime (22139561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2767442 + ... + 2767449.

It is an arithmetic number, because the mean of its divisors is an integer number (6457374).

Almost surely, 2^22139564 is an apocalyptic number.

It is an amenable number.

22139564 is a deficient number, since it is larger than the sum of its proper divisors (16604680).

22139564 is a wasteful number, since it uses less digits than its factorization.

22139564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5534895 (or 5534893 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 22139564 is about 4705.2698116049. The cubic root of 22139564 is about 280.7952054495.

The spelling of 22139564 in words is "twenty-two million, one hundred thirty-nine thousand, five hundred sixty-four".