23005565 has 32 divisors (see below), whose sum is σ = 31629312. Its totient is φ = 15912000.

The previous prime is 23005547. The next prime is 23005571. The reversal of 23005565 is 56550032.

It is not a de Polignac number, because 23005565 - 2⁸ = 23005309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175550 + ... + 175680.

It is an arithmetic number, because the mean of its divisors is an integer number (988416).

Almost surely, 2^23005565 is an apocalyptic number.

It is an amenable number.

23005565 is a deficient number, since it is larger than the sum of its proper divisors (8623747).

23005565 is a wasteful number, since it uses less digits than its factorization.

23005565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 23005565 is about 4796.4116795788. The cubic root of 23005565 is about 284.4096325410.

Adding to 23005565 its reverse (56550032), we get a palindrome (79555597).

The spelling of 23005565 in words is "twenty-three million, five thousand, five hundred sixty-five".