1313231131 has 2 divisors, whose sum is σ = 1313231132. Its totient is φ = 1313231130.

The previous prime is 1313231111. The next prime is 1313231177. The reversal of 1313231131 is 1311323131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1313231131 - 2¹⁷ = 1313100059 is a prime.

It is a super-2 number, since 2×1313231131² = 3449152006855078322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1313231099 and 1313231108.

It is not a weakly prime, because it can be changed into another prime (1313231111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656615565 + 656615566.

It is an arithmetic number, because the mean of its divisors is an integer number (656615566).

Almost surely, 2^1313231131 is an apocalyptic number.

1313231131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313231131 is an equidigital number, since it uses as much as digits as its factorization.

1313231131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 19.

The square root of 1313231131 is about 36238.5310270712. The cubic root of 1313231131 is about 1095.0830489613.

Adding to 1313231131 its reverse (1311323131), we get a palindrome (2624554262).

The spelling of 1313231131 in words is "one billion, three hundred thirteen million, two hundred thirty-one thousand, one hundred thirty-one".