231331023 has 48 divisors (see below), whose sum is σ = 438547200. Its totient is φ = 113840640.

The previous prime is 231331007. The next prime is 231331049. The reversal of 231331023 is 320133132.

It is not a de Polignac number, because 231331023 - 2⁴ = 231331007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231330987 and 231331005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231331003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4383 + ... + 21951.

It is an arithmetic number, because the mean of its divisors is an integer number (9136400).

Almost surely, 2^231331023 is an apocalyptic number.

231331023 is a deficient number, since it is larger than the sum of its proper divisors (207216177).

231331023 is a wasteful number, since it uses less digits than its factorization.

231331023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17612 (or 17609 counting only the distinct ones).

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

The square root of 231331023 is about 15209.5701122681. The cubic root of 231331023 is about 613.8721904322.

Adding to 231331023 its reverse (320133132), we get a palindrome (551464155).

The spelling of 231331023 in words is "two hundred thirty-one million, three hundred thirty-one thousand, twenty-three".