231320032231 has 4 divisors (see below), whose sum is σ = 237571925032. Its totient is φ = 225068139432.

The previous prime is 231320032187. The next prime is 231320032253. The reversal of 231320032231 is 132230023132.

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 231320032231 - 2²³ = 231311643623 is a prime.

It is a super-2 number, since 2×231320032231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231320032271) 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, 3125946345 + ... + 3125946418.

It is an arithmetic number, because the mean of its divisors is an integer number (59392981258).

Almost surely, 2^231320032231 is an apocalyptic number.

231320032231 is a deficient number, since it is larger than the sum of its proper divisors (6251892801).

231320032231 is an equidigital number, since it uses as much as digits as its factorization.

231320032231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6251892800.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 231320032231 its reverse (132230023132), we get a palindrome (363550055363).

Subtracting from 231320032231 its reverse (132230023132), we obtain a palindrome (99090009099).

The spelling of 231320032231 in words is "two hundred thirty-one billion, three hundred twenty million, thirty-two thousand, two hundred thirty-one".