22539285 has 12 divisors (see below), whose sum is σ = 39068172. Its totient is φ = 12020928.

The previous prime is 22539281. The next prime is 22539313. The reversal of 22539285 is 58293522.

It can be written as a sum of positive squares in 2 ways, for example, as 17189316 + 5349969 = 4146^2 + 2313^2 .

It is not a de Polignac number, because 22539285 - 2² = 22539281 is a prime.

It is a super-2 number, since 2×22539285² = 1016038736622450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22539281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250392 + ... + 250481.

It is an arithmetic number, because the mean of its divisors is an integer number (3255681).

Almost surely, 2^22539285 is an apocalyptic number.

It is an amenable number.

22539285 is a deficient number, since it is larger than the sum of its proper divisors (16528887).

22539285 is a wasteful number, since it uses less digits than its factorization.

22539285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500884 (or 500881 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 22539285 is about 4747.5556868772. Note that the first 3 decimals coincide. The cubic root of 22539285 is about 282.4750180222.

The spelling of 22539285 in words is "twenty-two million, five hundred thirty-nine thousand, two hundred eighty-five".