1317310231 has 2 divisors, whose sum is σ = 1317310232. Its totient is φ = 1317310230.

The previous prime is 1317310213. The next prime is 1317310321. The reversal of 1317310231 is 1320137131.

Together with next prime (1317310321) it forms an Ormiston pair, because they use the same digits, order apart.

Together with previous prime (1317310213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1320137131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1317310231 - 2⁵ = 1317310199 is a prime.

It is a super-2 number, since 2×1317310231² = 3470612489394546722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1317310531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658655115 + 658655116.

It is an arithmetic number, because the mean of its divisors is an integer number (658655116).

Almost surely, 2^1317310231 is an apocalyptic number.

1317310231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317310231 is an equidigital number, since it uses as much as digits as its factorization.

1317310231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 1317310231 is about 36294.7686450816. The cubic root of 1317310231 is about 1096.2157097466.

Adding to 1317310231 its reverse (1320137131), we get a palindrome (2637447362).

The spelling of 1317310231 in words is "one billion, three hundred seventeen million, three hundred ten thousand, two hundred thirty-one".