1311343031 has 2 divisors, whose sum is σ = 1311343032. Its totient is φ = 1311343030.

The previous prime is 1311342983. The next prime is 1311343037. The reversal of 1311343031 is 1303431131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311343031 - 2¹⁴ = 1311326647 is a prime.

It is a super-2 number, since 2×1311343031² = 3439241089904533922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1311342994 and 1311343012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311343037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655671515 + 655671516.

It is an arithmetic number, because the mean of its divisors is an integer number (655671516).

Almost surely, 2^1311343031 is an apocalyptic number.

1311343031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311343031 is an equidigital number, since it uses as much as digits as its factorization.

1311343031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1311343031 is about 36212.4706558390. The cubic root of 1311343031 is about 1094.5579781495.

Adding to 1311343031 its reverse (1303431131), we get a palindrome (2614774162).

The spelling of 1311343031 in words is "one billion, three hundred eleven million, three hundred forty-three thousand, thirty-one".