22815239 has 8 divisors (see below), whose sum is σ = 23166000. Its totient is φ = 22466752.

The previous prime is 22815227. The next prime is 22815259. The reversal of 22815239 is 93251822.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22815239 - 2²⁴ = 6038023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22815209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34292 + ... + 34950.

It is an arithmetic number, because the mean of its divisors is an integer number (2895750).

Almost surely, 2^22815239 is an apocalyptic number.

22815239 is a deficient number, since it is larger than the sum of its proper divisors (350761).

22815239 is an equidigital number, since it uses as much as digits as its factorization.

22815239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137.

The product of its digits is 8640, while the sum is 32.

The square root of 22815239 is about 4776.5300166543. The cubic root of 22815239 is about 283.6231487434.

The spelling of 22815239 in words is "twenty-two million, eight hundred fifteen thousand, two hundred thirty-nine".