23520565 has 16 divisors (see below), whose sum is σ = 28828800. Its totient is φ = 18418752.

The previous prime is 23520557. The next prime is 23520587. The reversal of 23520565 is 56502532.

It is a cyclic number.

It is not a de Polignac number, because 23520565 - 2³ = 23520557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55926 + ... + 56344.

It is an arithmetic number, because the mean of its divisors is an integer number (1801800).

Almost surely, 2^23520565 is an apocalyptic number.

It is an amenable number.

23520565 is a deficient number, since it is larger than the sum of its proper divisors (5308235).

23520565 is a wasteful number, since it uses less digits than its factorization.

23520565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

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

The square root of 23520565 is about 4849.8005113613. The cubic root of 23520565 is about 286.5162444710.

The spelling of 23520565 in words is "twenty-three million, five hundred twenty thousand, five hundred sixty-five".