23165813 has 6 divisors (see below), whose sum is σ = 25463382. Its totient is φ = 21059720.

The previous prime is 23165803. The next prime is 23165839. The reversal of 23165813 is 31856132.

It can be written as a sum of positive squares in only one way, i.e., 23107249 + 58564 = 4807^2 + 242^2 .

It is not a de Polignac number, because 23165813 - 2⁸ = 23165557 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 (23165803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95606 + ... + 95847.

It is an arithmetic number, because the mean of its divisors is an integer number (4243897).

Almost surely, 2^23165813 is an apocalyptic number.

It is an amenable number.

23165813 is a deficient number, since it is larger than the sum of its proper divisors (2297569).

23165813 is a wasteful number, since it uses less digits than its factorization.

23165813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191475 (or 191464 counting only the distinct ones).

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

The square root of 23165813 is about 4813.0876784035. The cubic root of 23165813 is about 285.0684682119.

The spelling of 23165813 in words is "twenty-three million, one hundred sixty-five thousand, eight hundred thirteen".