24523 has 4 divisors (see below), whose sum is σ = 24840. Its totient is φ = 24208.

The previous prime is 24517. The next prime is 24527. The reversal of 24523 is 32542.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24523 is a prime.

It is a Duffinian number.

24523 is a lucky number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 24497 and 24506.

It is not an unprimeable number, because it can be changed into a prime (24527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48 + ... + 226.

It is an arithmetic number, because the mean of its divisors is an integer number (6210).

2²⁴⁵²³ is an apocalyptic number.

24523 is a deficient number, since it is larger than the sum of its proper divisors (317).

24523 is a wasteful number, since it uses less digits than its factorization.

24523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316.

The product of its digits is 240, while the sum is 16.

The square root of 24523 is about 156.5982119949. The cubic root of 24523 is about 29.0530144016.

The spelling of 24523 in words is "twenty-four thousand, five hundred twenty-three".