313222249 has 2 divisors, whose sum is σ = 313222250. Its totient is φ = 313222248.

The previous prime is 313222199. The next prime is 313222271. The reversal of 313222249 is 942222313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299532249 + 13690000 = 17307^2 + 3700^2 .

It is an emirp because it is prime and its reverse (942222313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313222249 is a prime.

It is not a weakly prime, because it can be changed into another prime (313202249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156611124 + 156611125.

It is an arithmetic number, because the mean of its divisors is an integer number (156611125).

Almost surely, 2^313222249 is an apocalyptic number.

It is an amenable number.

313222249 is a deficient number, since it is larger than the sum of its proper divisors (1).

313222249 is an equidigital number, since it uses as much as digits as its factorization.

313222249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 313222249 is about 17698.0860264606. The cubic root of 313222249 is about 679.1267980126.

The spelling of 313222249 in words is "three hundred thirteen million, two hundred twenty-two thousand, two hundred forty-nine".