23165239 has 4 divisors (see below), whose sum is σ = 23210056. Its totient is φ = 23120424.

The previous prime is 23165231. The next prime is 23165243. The reversal of 23165239 is 93256132.

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 23165239 - 2³ = 23165231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23165239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23165231) 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, 21624 + ... + 22669.

It is an arithmetic number, because the mean of its divisors is an integer number (5802514).

Almost surely, 2^23165239 is an apocalyptic number.

23165239 is a deficient number, since it is larger than the sum of its proper divisors (44817).

23165239 is an equidigital number, since it uses as much as digits as its factorization.

23165239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44816.

The product of its digits is 9720, while the sum is 31.

The square root of 23165239 is about 4813.0280489521. The cubic root of 23165239 is about 285.0661137272.

The spelling of 23165239 in words is "twenty-three million, one hundred sixty-five thousand, two hundred thirty-nine".