23165138 has 8 divisors (see below), whose sum is σ = 34768332. Its totient is φ = 11575696.

The previous prime is 23165137. The next prime is 23165167. The reversal of 23165138 is 83156132.

It can be written as a sum of positive squares in 2 ways, for example, as 23164969 + 169 = 4813^2 + 13^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 23165138.

It is not an unprimeable number, because it can be changed into a prime (23165137) 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, 3956 + ... + 7872.

Almost surely, 2^23165138 is an apocalyptic number.

23165138 is a deficient number, since it is larger than the sum of its proper divisors (11603194).

23165138 is a wasteful number, since it uses less digits than its factorization.

23165138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6876.

The product of its digits is 4320, while the sum is 29.

The square root of 23165138 is about 4813.0175565855. The cubic root of 23165138 is about 285.0656994324.

The spelling of 23165138 in words is "twenty-three million, one hundred sixty-five thousand, one hundred thirty-eight".