23622565 has 4 divisors (see below), whose sum is σ = 28347084. Its totient is φ = 18898048.

The previous prime is 23622563. The next prime is 23622607. The reversal of 23622565 is 56522632.

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 5788836 + 17833729 = 2406^2 + 4223^2 .

It is a cyclic number.

It is not a de Polignac number, because 23622565 - 2¹ = 23622563 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23622563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2362252 + ... + 2362261.

It is an arithmetic number, because the mean of its divisors is an integer number (7086771).

Almost surely, 2^23622565 is an apocalyptic number.

It is an amenable number.

23622565 is a deficient number, since it is larger than the sum of its proper divisors (4724519).

23622565 is an equidigital number, since it uses as much as digits as its factorization.

23622565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4724518.

The product of its digits is 21600, while the sum is 31.

The square root of 23622565 is about 4860.3050315798. The cubic root of 23622565 is about 286.9298189027.

It can be divided in two parts, 236 and 22565, that added together give a square (22801 = 151²).

The spelling of 23622565 in words is "twenty-three million, six hundred twenty-two thousand, five hundred sixty-five".