22645239 has 4 divisors (see below), whose sum is σ = 30193656. Its totient is φ = 15096824.

The previous prime is 22645229. The next prime is 22645247. The reversal of 22645239 is 93254622.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22645239 - 2⁴ = 22645223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22645229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3774204 + ... + 3774209.

It is an arithmetic number, because the mean of its divisors is an integer number (7548414).

Almost surely, 2^22645239 is an apocalyptic number.

22645239 is a deficient number, since it is larger than the sum of its proper divisors (7548417).

22645239 is an equidigital number, since it uses as much as digits as its factorization.

22645239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7548416.

The product of its digits is 25920, while the sum is 33.

The square root of 22645239 is about 4758.7013984910. The cubic root of 22645239 is about 282.9169513289.

It can be divided in two parts, 2264 and 5239, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 22645239 in words is "twenty-two million, six hundred forty-five thousand, two hundred thirty-nine".