23013565 has 4 divisors (see below), whose sum is σ = 27616284. Its totient is φ = 18410848.

The previous prime is 23013553. The next prime is 23013577. The reversal of 23013565 is 56531032.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (23013553) and next prime (23013577).

It can be written as a sum of positive squares in 2 ways, for example, as 6416089 + 16597476 = 2533^2 + 4074^2 .

It is a cyclic number.

It is not a de Polignac number, because 23013565 - 2⁵ = 23013533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2301352 + ... + 2301361.

It is an arithmetic number, because the mean of its divisors is an integer number (6904071).

Almost surely, 2^23013565 is an apocalyptic number.

It is an amenable number.

23013565 is a deficient number, since it is larger than the sum of its proper divisors (4602719).

23013565 is an equidigital number, since it uses as much as digits as its factorization.

23013565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4602718.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 23013565 is about 4797.2455638627. The cubic root of 23013565 is about 284.4425957736.

Adding to 23013565 its reverse (56531032), we get a palindrome (79544597).

The spelling of 23013565 in words is "twenty-three million, thirteen thousand, five hundred sixty-five".