23135565 has 16 divisors (see below), whose sum is σ = 37385856. Its totient is φ = 12216000.

The previous prime is 23135561. The next prime is 23135599. The reversal of 23135565 is 56553132.

It is not a de Polignac number, because 23135565 - 2² = 23135561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23135561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6121 + ... + 9150.

It is an arithmetic number, because the mean of its divisors is an integer number (2336616).

Almost surely, 2^23135565 is an apocalyptic number.

It is an amenable number.

23135565 is a deficient number, since it is larger than the sum of its proper divisors (14250291).

23135565 is a wasteful number, since it uses less digits than its factorization.

23135565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15380.

The product of its digits is 13500, while the sum is 30.

The square root of 23135565 is about 4809.9443863729. The cubic root of 23135565 is about 284.9443412392.

Adding to 23135565 its reverse (56553132), we get a palindrome (79688697).

The spelling of 23135565 in words is "twenty-three million, one hundred thirty-five thousand, five hundred sixty-five".