23665216 has 28 divisors (see below), whose sum is σ = 47224188. Its totient is φ = 11766272.

The previous prime is 23665211. The next prime is 23665217. The reversal of 23665216 is 61256632.

It can be written as a sum of positive squares in 2 ways, for example, as 20070400 + 3594816 = 4480^2 + 1896^2 .

It is not an unprimeable number, because it can be changed into a prime (23665211) 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, 11670 + ... + 13546.

Almost surely, 2^23665216 is an apocalyptic number.

It is an amenable number.

23665216 is a deficient number, since it is larger than the sum of its proper divisors (23558972).

23665216 is a wasteful number, since it uses less digits than its factorization.

23665216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086 (or 2076 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 23665216 is about 4864.6907404274. The cubic root of 23665216 is about 287.1024008649.

The spelling of 23665216 in words is "twenty-three million, six hundred sixty-five thousand, two hundred sixteen".