312232321 has 2 divisors, whose sum is σ = 312232322. Its totient is φ = 312232320.

The previous prime is 312232289. The next prime is 312232351. The reversal of 312232321 is 123232213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220819600 + 91412721 = 14860^2 + 9561^2 .

It is a cyclic number.

It is not a de Polignac number, because 312232321 - 2⁵ = 312232289 is a prime.

It is not a weakly prime, because it can be changed into another prime (312232351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156116160 + 156116161.

It is an arithmetic number, because the mean of its divisors is an integer number (156116161).

Almost surely, 2^312232321 is an apocalyptic number.

It is an amenable number.

312232321 is a deficient number, since it is larger than the sum of its proper divisors (1).

312232321 is an equidigital number, since it uses as much as digits as its factorization.

312232321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 19.

The square root of 312232321 is about 17670.0968022249. The cubic root of 312232321 is about 678.4105907749.

Adding to 312232321 its reverse (123232213), we get a palindrome (435464534).

The spelling of 312232321 in words is "three hundred twelve million, two hundred thirty-two thousand, three hundred twenty-one".