22515239 has 2 divisors, whose sum is σ = 22515240. Its totient is φ = 22515238.

The previous prime is 22515217. The next prime is 22515257. The reversal of 22515239 is 93251522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22515239 - 2²⁴ = 5738023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22515289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11257619 + 11257620.

It is an arithmetic number, because the mean of its divisors is an integer number (11257620).

Almost surely, 2^22515239 is an apocalyptic number.

22515239 is a deficient number, since it is larger than the sum of its proper divisors (1).

22515239 is an equidigital number, since it uses as much as digits as its factorization.

22515239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 29.

The square root of 22515239 is about 4745.0225499991. The cubic root of 22515239 is about 282.3745296053.

The spelling of 22515239 in words is "twenty-two million, five hundred fifteen thousand, two hundred thirty-nine".