23520559 has 4 divisors (see below), whose sum is σ = 24543216. Its totient is φ = 22497904.

The previous prime is 23520557. The next prime is 23520587. The reversal of 23520559 is 95502532.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23520559 - 2¹ = 23520557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23520559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23520557) 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, 511294 + ... + 511339.

It is an arithmetic number, because the mean of its divisors is an integer number (6135804).

Almost surely, 2^23520559 is an apocalyptic number.

23520559 is a deficient number, since it is larger than the sum of its proper divisors (1022657).

23520559 is a wasteful number, since it uses less digits than its factorization.

23520559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022656.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 23520559 is about 4849.7998927791. The cubic root of 23520559 is about 286.5162201080.

The spelling of 23520559 in words is "twenty-three million, five hundred twenty thousand, five hundred fifty-nine".