1311795031 has 2 divisors, whose sum is σ = 1311795032. Its totient is φ = 1311795030.

The previous prime is 1311795013. The next prime is 1311795049. The reversal of 1311795031 is 1305971131.

Together with previous prime (1311795013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (1311795013) and next prime (1311795049).

It is a cyclic number.

It is not a de Polignac number, because 1311795031 - 2⁵ = 1311794999 is a prime.

It is a super-2 number, since 2×1311795031² = 3441612406712581922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1311794984 and 1311795002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311793031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655897515 + 655897516.

It is an arithmetic number, because the mean of its divisors is an integer number (655897516).

Almost surely, 2^1311795031 is an apocalyptic number.

1311795031 is the 16198-th centered decagonal number.

1311795031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311795031 is an equidigital number, since it uses as much as digits as its factorization.

1311795031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 1311795031 is about 36218.7110621016. The cubic root of 1311795031 is about 1094.6837228662.

The spelling of 1311795031 in words is "one billion, three hundred eleven million, seven hundred ninety-five thousand, thirty-one".