313222081 has 2 divisors, whose sum is σ = 313222082. Its totient is φ = 313222080.

The previous prime is 313222043. The next prime is 313222097. The reversal of 313222081 is 180222313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309056400 + 4165681 = 17580^2 + 2041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313222081 is a prime.

It is a super-2 number, since 2×313222081² = 196216144051941122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (313222031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156611040 + 156611041.

It is an arithmetic number, because the mean of its divisors is an integer number (156611041).

Almost surely, 2^313222081 is an apocalyptic number.

It is an amenable number.

313222081 is a deficient number, since it is larger than the sum of its proper divisors (1).

313222081 is an equidigital number, since it uses as much as digits as its factorization.

313222081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 313222081 is about 17698.0812801840. The cubic root of 313222081 is about 679.1266765937.

Adding to 313222081 its reverse (180222313), we get a palindrome (493444394).

The spelling of 313222081 in words is "three hundred thirteen million, two hundred twenty-two thousand, eighty-one".