23503231 has 4 divisors (see below), whose sum is σ = 24885792. Its totient is φ = 22120672.

The previous prime is 23503229. The next prime is 23503273. The reversal of 23503231 is 13230532.

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

It is not a de Polignac number, because 23503231 - 2¹ = 23503229 is a prime.

It is a super-2 number, since 2×23503231² = 1104803734878722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23503199 and 23503208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23563231) 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, 691255 + ... + 691288.

It is an arithmetic number, because the mean of its divisors is an integer number (6221448).

Almost surely, 2^23503231 is an apocalyptic number.

23503231 is a deficient number, since it is larger than the sum of its proper divisors (1382561).

23503231 is a wasteful number, since it uses less digits than its factorization.

23503231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382560.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 23503231 is about 4848.0130981671. The cubic root of 23503231 is about 286.4458423480.

Adding to 23503231 its reverse (13230532), we get a palindrome (36733763).

The spelling of 23503231 in words is "twenty-three million, five hundred three thousand, two hundred thirty-one".