23165159 has 4 divisors (see below), whose sum is σ = 23175720. Its totient is φ = 23154600.

The previous prime is 23165137. The next prime is 23165167. The reversal of 23165159 is 95156132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23165159 - 2²⁰ = 22116583 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 (23165119) 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, 617 + ... + 6834.

It is an arithmetic number, because the mean of its divisors is an integer number (5793930).

Almost surely, 2^23165159 is an apocalyptic number.

23165159 is a deficient number, since it is larger than the sum of its proper divisors (10561).

23165159 is an equidigital number, since it uses as much as digits as its factorization.

23165159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10560.

The product of its digits is 8100, while the sum is 32.

The square root of 23165159 is about 4813.0197381685. The cubic root of 23165159 is about 285.0657855730.

The spelling of 23165159 in words is "twenty-three million, one hundred sixty-five thousand, one hundred fifty-nine".