23204531 has 4 divisors (see below), whose sum is σ = 26519472. Its totient is φ = 19889592.

The previous prime is 23204527. The next prime is 23204557. The reversal of 23204531 is 13540232.

It is a happy number.

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 23204531 - 2² = 23204527 is a prime.

It is a super-2 number, since 2×23204531² = 1076900517859922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23204131) 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, 1657460 + ... + 1657473.

It is an arithmetic number, because the mean of its divisors is an integer number (6629868).

Almost surely, 2^23204531 is an apocalyptic number.

23204531 is a deficient number, since it is larger than the sum of its proper divisors (3314941).

23204531 is an equidigital number, since it uses as much as digits as its factorization.

23204531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314940.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 23204531 is about 4817.1081573907. The cubic root of 23204531 is about 285.2271954656.

Adding to 23204531 its reverse (13540232), we get a palindrome (36744763).

The spelling of 23204531 in words is "twenty-three million, two hundred four thousand, five hundred thirty-one".