1312043431 has 2 divisors, whose sum is σ = 1312043432. Its totient is φ = 1312043430.

The previous prime is 1312043413. The next prime is 1312043503. The reversal of 1312043431 is 1343402131.

Together with previous prime (1312043413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312043431 - 2²⁵ = 1278488999 is a prime.

It is a super-2 number, since 2×1312043431² = 3442915929660503522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312043231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656021715 + 656021716.

It is an arithmetic number, because the mean of its divisors is an integer number (656021716).

Almost surely, 2^1312043431 is an apocalyptic number.

1312043431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312043431 is an equidigital number, since it uses as much as digits as its factorization.

1312043431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1312043431 is about 36222.1400665394. The cubic root of 1312043431 is about 1094.7528145228.

Adding to 1312043431 its reverse (1343402131), we get a palindrome (2655445562).

The spelling of 1312043431 in words is "one billion, three hundred twelve million, forty-three thousand, four hundred thirty-one".