23513523 has 8 divisors (see below), whose sum is σ = 34201536. Its totient is φ = 14250600.

The previous prime is 23513513. The next prime is 23513527. The reversal of 23513523 is 32531532.

It is a happy number.

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

It is not a de Polignac number, because 23513523 - 2⁹ = 23513011 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 23513493 and 23513502.

It is not an unprimeable number, because it can be changed into a prime (23513527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356233 + ... + 356298.

It is an arithmetic number, because the mean of its divisors is an integer number (4275192).

Almost surely, 2^23513523 is an apocalyptic number.

23513523 is a deficient number, since it is larger than the sum of its proper divisors (10688013).

23513523 is a wasteful number, since it uses less digits than its factorization.

23513523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712545.

The product of its digits is 2700, while the sum is 24.

The square root of 23513523 is about 4849.0744477684. The cubic root of 23513523 is about 286.4876475278.

Subtracting 23513523 from its reverse (32531532), we obtain a square (9018009 = 3003²).

The spelling of 23513523 in words is "twenty-three million, five hundred thirteen thousand, five hundred twenty-three".