1313312431 has 2 divisors, whose sum is σ = 1313312432. Its totient is φ = 1313312430.

The previous prime is 1313312423. The next prime is 1313312437. The reversal of 1313312431 is 1342133131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1313312431 - 2³ = 1313312423 is a prime.

It is a super-2 number, since 2×1313312431² = 3449579082838259522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313312437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656656215 + 656656216.

It is an arithmetic number, because the mean of its divisors is an integer number (656656216).

Almost surely, 2^1313312431 is an apocalyptic number.

1313312431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313312431 is an equidigital number, since it uses as much as digits as its factorization.

1313312431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 22.

The square root of 1313312431 is about 36239.6527439213. The cubic root of 1313312431 is about 1095.1056467641.

Adding to 1313312431 its reverse (1342133131), we get a palindrome (2655445562).

The spelling of 1313312431 in words is "one billion, three hundred thirteen million, three hundred twelve thousand, four hundred thirty-one".