231310023231 has 24 divisors (see below), whose sum is σ = 377649022080. Its totient is φ = 125220462192.

The previous prime is 231310023179. The next prime is 231310023239. The reversal of 231310023231 is 132320013132.

It is not a de Polignac number, because 231310023231 - 2⁷ = 231310023103 is a prime.

It is a super-2 number, since 2×231310023231² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 231310023198 and 231310023207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231310023239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41406091 + ... + 41411676.

It is an arithmetic number, because the mean of its divisors is an integer number (15735375920).

Almost surely, 2^231310023231 is an apocalyptic number.

231310023231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231310023231 is a deficient number, since it is larger than the sum of its proper divisors (146338998849).

231310023231 is a wasteful number, since it uses less digits than its factorization.

231310023231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82817803 (or 82817796 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 231310023231 its reverse (132320013132), we get a palindrome (363630036363).

The spelling of 231310023231 in words is "two hundred thirty-one billion, three hundred ten million, twenty-three thousand, two hundred thirty-one".