323131231 has 4 divisors (see below), whose sum is σ = 323984200. Its totient is φ = 322278264.

The previous prime is 323131199. The next prime is 323131243. The reversal of 323131231 is 132131323.

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 323131231 - 2⁵ = 323131199 is a prime.

It is a super-2 number, since 2×323131231² = 208827584895150722, 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 = 323131199 and 323131208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323131261) 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, 425916 + ... + 426673.

It is an arithmetic number, because the mean of its divisors is an integer number (80996050).

Almost surely, 2^323131231 is an apocalyptic number.

323131231 is a deficient number, since it is larger than the sum of its proper divisors (852969).

323131231 is an equidigital number, since it uses as much as digits as its factorization.

323131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852968.

The product of its digits is 324, while the sum is 19.

The square root of 323131231 is about 17975.8513289357. The cubic root of 323131231 is about 686.2141119229.

Adding to 323131231 its reverse (132131323), we get a palindrome (455262554).

The spelling of 323131231 in words is "three hundred twenty-three million, one hundred thirty-one thousand, two hundred thirty-one".