22505239 has 2 divisors, whose sum is σ = 22505240. Its totient is φ = 22505238.

The previous prime is 22505207. The next prime is 22505251. The reversal of 22505239 is 93250522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22505239 - 2⁵ = 22505207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22500239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11252619 + 11252620.

It is an arithmetic number, because the mean of its divisors is an integer number (11252620).

Almost surely, 2^22505239 is an apocalyptic number.

22505239 is a deficient number, since it is larger than the sum of its proper divisors (1).

22505239 is an equidigital number, since it uses as much as digits as its factorization.

22505239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 22505239 is about 4743.9686971986. The cubic root of 22505239 is about 282.3327184650.

The spelling of 22505239 in words is "twenty-two million, five hundred five thousand, two hundred thirty-nine".