313221269 has 2 divisors, whose sum is σ = 313221270. Its totient is φ = 313221268.

The previous prime is 313221253. The next prime is 313221281. The reversal of 313221269 is 962122313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160402225 + 152819044 = 12665^2 + 12362^2 .

It is an emirp because it is prime and its reverse (962122313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313221269 - 2⁴ = 313221253 is a prime.

It is a super-2 number, since 2×313221269² = 196215126707940722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313221299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156610634 + 156610635.

It is an arithmetic number, because the mean of its divisors is an integer number (156610635).

Almost surely, 2^313221269 is an apocalyptic number.

It is an amenable number.

313221269 is a deficient number, since it is larger than the sum of its proper divisors (1).

313221269 is an equidigital number, since it uses as much as digits as its factorization.

313221269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 313221269 is about 17698.0583398293. The cubic root of 313221269 is about 679.1260897350.

The spelling of 313221269 in words is "three hundred thirteen million, two hundred twenty-one thousand, two hundred sixty-nine".