23235665 has 4 divisors (see below), whose sum is σ = 27882804. Its totient is φ = 18588528.

The previous prime is 23235661. The next prime is 23235679. The reversal of 23235665 is 56653232.

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 4330561 + 18905104 = 2081^2 + 4348^2 .

It is a cyclic number.

It is not a de Polignac number, because 23235665 - 2² = 23235661 is a prime.

It is a super-2 number, since 2×23235665² = 1079792255984450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23235661) 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, 2323562 + ... + 2323571.

It is an arithmetic number, because the mean of its divisors is an integer number (6970701).

Almost surely, 2^23235665 is an apocalyptic number.

It is an amenable number.

23235665 is a deficient number, since it is larger than the sum of its proper divisors (4647139).

23235665 is an equidigital number, since it uses as much as digits as its factorization.

23235665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4647138.

The product of its digits is 32400, while the sum is 32.

The square root of 23235665 is about 4820.3386810472. The cubic root of 23235665 is about 285.3547035350.

Adding to 23235665 its reverse (56653232), we get a palindrome (79888897).

The spelling of 23235665 in words is "twenty-three million, two hundred thirty-five thousand, six hundred sixty-five".