23502523 has 4 divisors (see below), whose sum is σ = 25639128. Its totient is φ = 21365920.

The previous prime is 23502463. The next prime is 23502533. The reversal of 23502523 is 32520532.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23502523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23502494 and 23502503.

It is not an unprimeable number, because it can be changed into a prime (23502533) 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, 1068286 + ... + 1068307.

It is an arithmetic number, because the mean of its divisors is an integer number (6409782).

Almost surely, 2^23502523 is an apocalyptic number.

23502523 is a deficient number, since it is larger than the sum of its proper divisors (2136605).

23502523 is a wasteful number, since it uses less digits than its factorization.

23502523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136604.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 23502523 is about 4847.9400780125. The cubic root of 23502523 is about 286.4429660669.

Subtracting 23502523 from its reverse (32520532), we obtain a square (9018009 = 3003²).

It can be divided in two parts, 23502 and 523, that added together give a square (24025 = 155²).

The spelling of 23502523 in words is "twenty-three million, five hundred two thousand, five hundred twenty-three".