22539393 has 6 divisors (see below), whose sum is σ = 32556914. Its totient is φ = 15026256.

The previous prime is 22539359. The next prime is 22539421. The reversal of 22539393 is 39393522.

It can be written as a sum of positive squares in only one way, i.e., 21594609 + 944784 = 4647^2 + 972^2 .

It is not a de Polignac number, because 22539393 - 2²⁴ = 5762177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22539313) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1252180 + ... + 1252197.

Almost surely, 2^22539393 is an apocalyptic number.

It is an amenable number.

22539393 is a deficient number, since it is larger than the sum of its proper divisors (10017521).

22539393 is a wasteful number, since it uses less digits than its factorization.

22539393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504383 (or 2504380 counting only the distinct ones).

The product of its digits is 43740, while the sum is 36.

The square root of 22539393 is about 4747.5670611377. The cubic root of 22539393 is about 282.4754691937.

The spelling of 22539393 in words is "twenty-two million, five hundred thirty-nine thousand, three hundred ninety-three".