317222491 has 2 divisors, whose sum is σ = 317222492. Its totient is φ = 317222490.

The previous prime is 317222467. The next prime is 317222513. The reversal of 317222491 is 194222713.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 317222491 - 2⁵ = 317222459 is a prime.

It is not a weakly prime, because it can be changed into another prime (317222441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158611245 + 158611246.

It is an arithmetic number, because the mean of its divisors is an integer number (158611246).

Almost surely, 2^317222491 is an apocalyptic number.

317222491 is a deficient number, since it is larger than the sum of its proper divisors (1).

317222491 is an equidigital number, since it uses as much as digits as its factorization.

317222491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 317222491 is about 17810.7408885762. The cubic root of 317222491 is about 682.0056780085.

It can be divided in two parts, 317222 and 491, that added together give a palindrome (317713).

The spelling of 317222491 in words is "three hundred seventeen million, two hundred twenty-two thousand, four hundred ninety-one".