312320231 has 2 divisors, whose sum is σ = 312320232. Its totient is φ = 312320230.

The previous prime is 312320201. The next prime is 312320237. The reversal of 312320231 is 132023213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312320231 - 2⁶ = 312320167 is a prime.

It is a super-2 number, since 2×312320231² = 195087853383786722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312320237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156160115 + 156160116.

It is an arithmetic number, because the mean of its divisors is an integer number (156160116).

Almost surely, 2^312320231 is an apocalyptic number.

312320231 is a deficient number, since it is larger than the sum of its proper divisors (1).

312320231 is an equidigital number, since it uses as much as digits as its factorization.

312320231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 312320231 is about 17672.5841630476. The cubic root of 312320231 is about 678.4742543514.

Adding to 312320231 its reverse (132023213), we get a palindrome (444343444).

The spelling of 312320231 in words is "three hundred twelve million, three hundred twenty thousand, two hundred thirty-one".