23131233 has 6 divisors (see below), whose sum is σ = 33411794. Its totient is φ = 15420816.

The previous prime is 23131231. The next prime is 23131249. The reversal of 23131233 is 33213132.

It can be written as a sum of positive squares in only one way, i.e., 13749264 + 9381969 = 3708^2 + 3063^2 .

It is not a de Polignac number, because 23131233 - 2¹ = 23131231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131231) 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 5 ways as a sum of consecutive naturals, for example, 1285060 + ... + 1285077.

Almost surely, 2^23131233 is an apocalyptic number.

It is an amenable number.

23131233 is a deficient number, since it is larger than the sum of its proper divisors (10280561).

23131233 is a wasteful number, since it uses less digits than its factorization.

23131233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570143 (or 2570140 counting only the distinct ones).

The product of its digits is 324, while the sum is 18.

The square root of 23131233 is about 4809.4940482342. The cubic root of 23131233 is about 284.9265554055.

Adding to 23131233 its reverse (33213132), we get a palindrome (56344365).

The spelling of 23131233 in words is "twenty-three million, one hundred thirty-one thousand, two hundred thirty-three".