23133665 has 4 divisors (see below), whose sum is σ = 27760404. Its totient is φ = 18506928.

The previous prime is 23133647. The next prime is 23133667. The reversal of 23133665 is 56633132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10679824 + 12453841 = 3268^2 + 3529^2 .

It is a cyclic number.

It is not a de Polignac number, because 23133665 - 2¹² = 23129569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23133667) 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, 2313362 + ... + 2313371.

It is an arithmetic number, because the mean of its divisors is an integer number (6940101).

Almost surely, 2^23133665 is an apocalyptic number.

It is an amenable number.

23133665 is a deficient number, since it is larger than the sum of its proper divisors (4626739).

23133665 is an equidigital number, since it uses as much as digits as its factorization.

23133665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626738.

The product of its digits is 9720, while the sum is 29.

The square root of 23133665 is about 4809.7468748366. The cubic root of 23133665 is about 284.9365407083.

Adding to 23133665 its reverse (56633132), we get a palindrome (79766797).

The spelling of 23133665 in words is "twenty-three million, one hundred thirty-three thousand, six hundred sixty-five".