23061565 has 4 divisors (see below), whose sum is σ = 27673884. Its totient is φ = 18449248.

The previous prime is 23061559. The next prime is 23061569. The reversal of 23061565 is 56516032.

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 17994564 + 5067001 = 4242^2 + 2251^2 .

It is a cyclic number.

It is not a de Polignac number, because 23061565 - 2⁹ = 23061053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23061569) 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, 2306152 + ... + 2306161.

It is an arithmetic number, because the mean of its divisors is an integer number (6918471).

Almost surely, 2^23061565 is an apocalyptic number.

It is an amenable number.

23061565 is a deficient number, since it is larger than the sum of its proper divisors (4612319).

23061565 is an equidigital number, since it uses as much as digits as its factorization.

23061565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4612318.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 23061565 is about 4802.2458287764. The cubic root of 23061565 is about 284.6402149209.

Adding to 23061565 its reverse (56516032), we get a palindrome (79577597).

The spelling of 23061565 in words is "twenty-three million, sixty-one thousand, five hundred sixty-five".