22530565 has 8 divisors (see below), whose sum is σ = 27547128. Its totient is φ = 17684160.

The previous prime is 22530539. The next prime is 22530569. The reversal of 22530565 is 56503522.

It can be written as a sum of positive squares in 4 ways, for example, as 2896804 + 19633761 = 1702^2 + 4431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-22530565 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22530569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42246 + ... + 42775.

It is an arithmetic number, because the mean of its divisors is an integer number (3443391).

Almost surely, 2^22530565 is an apocalyptic number.

It is an amenable number.

22530565 is a deficient number, since it is larger than the sum of its proper divisors (5016563).

22530565 is an equidigital number, since it uses as much as digits as its factorization.

22530565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85079.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 22530565 is about 4746.6372307140. The cubic root of 22530565 is about 282.4385853391.

The spelling of 22530565 in words is "twenty-two million, five hundred thirty thousand, five hundred sixty-five".