313212281 has 2 divisors, whose sum is σ = 313212282. Its totient is φ = 313212280.

The previous prime is 313212259. The next prime is 313212287. The reversal of 313212281 is 182212313.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301543225 + 11669056 = 17365^2 + 3416^2 .

It is an emirp because it is prime and its reverse (182212313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313212281 - 2¹⁸ = 312950137 is a prime.

It is a super-2 number, since 2×313212281² = 196203865938445922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (313212287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156606140 + 156606141.

It is an arithmetic number, because the mean of its divisors is an integer number (156606141).

Almost surely, 2^313212281 is an apocalyptic number.

It is an amenable number.

313212281 is a deficient number, since it is larger than the sum of its proper divisors (1).

313212281 is an equidigital number, since it uses as much as digits as its factorization.

313212281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

The square root of 313212281 is about 17697.8044118473. The cubic root of 313212281 is about 679.1195937482.

Adding to 313212281 its reverse (182212313), we get a palindrome (495424594).

The spelling of 313212281 in words is "three hundred thirteen million, two hundred twelve thousand, two hundred eighty-one".