1311599131 has 2 divisors, whose sum is σ = 1311599132. Its totient is φ = 1311599130.

The previous prime is 1311599111. The next prime is 1311599161. The reversal of 1311599131 is 1319951131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311599131 - 2⁵ = 1311599099 is a prime.

It is a super-2 number, since 2×1311599131² = 3440584560879910322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1311599111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655799565 + 655799566.

It is an arithmetic number, because the mean of its divisors is an integer number (655799566).

Almost surely, 2^1311599131 is an apocalyptic number.

1311599131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311599131 is an equidigital number, since it uses as much as digits as its factorization.

1311599131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3645, while the sum is 34.

The square root of 1311599131 is about 36216.0065578744. The cubic root of 1311599131 is about 1094.6292277629.

The spelling of 1311599131 in words is "one billion, three hundred eleven million, five hundred ninety-nine thousand, one hundred thirty-one".