23550565 has 4 divisors (see below), whose sum is σ = 28260684. Its totient is φ = 18840448.

The previous prime is 23550563. The next prime is 23550587. The reversal of 23550565 is 56505532.

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 11710084 + 11840481 = 3422^2 + 3441^2 .

It is a cyclic number.

It is not a de Polignac number, because 23550565 - 2¹ = 23550563 is a prime.

It is a super-2 number, since 2×23550565² = 1109258223638450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23550563) 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, 2355052 + ... + 2355061.

It is an arithmetic number, because the mean of its divisors is an integer number (7065171).

Almost surely, 2^23550565 is an apocalyptic number.

It is an amenable number.

23550565 is a deficient number, since it is larger than the sum of its proper divisors (4710119).

23550565 is an equidigital number, since it uses as much as digits as its factorization.

23550565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4710118.

The product of its (nonzero) digits is 22500, while the sum is 31.

The square root of 23550565 is about 4852.8924364754. The cubic root of 23550565 is about 286.6380079216.

The spelling of 23550565 in words is "twenty-three million, five hundred fifty thousand, five hundred sixty-five".