23430565 has 4 divisors (see below), whose sum is σ = 28116684. Its totient is φ = 18744448.

The previous prime is 23430559. The next prime is 23430569. The reversal of 23430565 is 56503432.

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 5866084 + 17564481 = 2422^2 + 4191^2 .

It is a cyclic number.

It is not a de Polignac number, because 23430565 - 2²¹ = 21333413 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23430569) 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, 2343052 + ... + 2343061.

It is an arithmetic number, because the mean of its divisors is an integer number (7029171).

Almost surely, 2^23430565 is an apocalyptic number.

It is an amenable number.

23430565 is a deficient number, since it is larger than the sum of its proper divisors (4686119).

23430565 is an equidigital number, since it uses as much as digits as its factorization.

23430565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4686118.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 23430565 is about 4840.5128860483. The cubic root of 23430565 is about 286.1503317445.

Adding to 23430565 its reverse (56503432), we get a palindrome (79933997).

The spelling of 23430565 in words is "twenty-three million, four hundred thirty thousand, five hundred sixty-five".