23280565 has 32 divisors (see below), whose sum is σ = 36889344. Its totient is φ = 13655040.

The previous prime is 23280563. The next prime is 23280571. The reversal of 23280565 is 56508232.

It is a happy number.

It is not a de Polignac number, because 23280565 - 2¹ = 23280563 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 (23280563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4767 + ... + 8323.

It is an arithmetic number, because the mean of its divisors is an integer number (1152792).

Almost surely, 2^23280565 is an apocalyptic number.

It is an amenable number.

23280565 is a deficient number, since it is larger than the sum of its proper divisors (13608779).

23280565 is a wasteful number, since it uses less digits than its factorization.

23280565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3597.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 23280565 is about 4824.9937823794. The cubic root of 23280565 is about 285.5383892933.

Adding to 23280565 its reverse (56508232), we get a palindrome (79788797).

The spelling of 23280565 in words is "twenty-three million, two hundred eighty thousand, five hundred sixty-five".