23009565 has 8 divisors (see below), whose sum is σ = 36815328. Its totient is φ = 12271760.

The previous prime is 23009521. The next prime is 23009611. The reversal of 23009565 is 56590032.

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

It is not a de Polignac number, because 23009565 - 2⁸ = 23009309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 766971 + ... + 767000.

It is an arithmetic number, because the mean of its divisors is an integer number (4601916).

Almost surely, 2^23009565 is an apocalyptic number.

It is an amenable number.

23009565 is a deficient number, since it is larger than the sum of its proper divisors (13805763).

23009565 is a wasteful number, since it uses less digits than its factorization.

23009565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533979.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 23009565 is about 4796.8286398411. The cubic root of 23009565 is about 284.4261151123.

Adding to 23009565 its reverse (56590032), we get a palindrome (79599597).

The spelling of 23009565 in words is "twenty-three million, nine thousand, five hundred sixty-five".