312331231 has 12 divisors (see below), whose sum is σ = 330139200. Its totient is φ = 295172640.

The previous prime is 312331213. The next prime is 312331277. The reversal of 312331231 is 132133213.

It is not a de Polignac number, because 312331231 - 2¹⁷ = 312200159 is a prime.

It is a super-2 number, since 2×312331231² = 195101595715950722, 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 = 312331199 and 312331208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312331211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54595 + ... + 60043.

It is an arithmetic number, because the mean of its divisors is an integer number (27511600).

Almost surely, 2^312331231 is an apocalyptic number.

312331231 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

312331231 is a deficient number, since it is larger than the sum of its proper divisors (17807969).

312331231 is an equidigital number, since it uses as much as digits as its factorization.

312331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566 (or 5523 counting only the distinct ones).

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

The square root of 312331231 is about 17672.8953768193. The cubic root of 312331231 is about 678.4822196046.

Adding to 312331231 its reverse (132133213), we get a palindrome (444464444).

The spelling of 312331231 in words is "three hundred twelve million, three hundred thirty-one thousand, two hundred thirty-one".