1316531131 has 2 divisors, whose sum is σ = 1316531132. Its totient is φ = 1316531130.

The previous prime is 1316531123. The next prime is 1316531137. The reversal of 1316531131 is 1311356131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1316531131 - 2³ = 1316531123 is a prime.

It is a super-2 number, since 2×1316531131² = 3466508437784278322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1316531096 and 1316531105.

It is not a weakly prime, because it can be changed into another prime (1316531137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658265565 + 658265566.

It is an arithmetic number, because the mean of its divisors is an integer number (658265566).

Almost surely, 2^1316531131 is an apocalyptic number.

1316531131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316531131 is an equidigital number, since it uses as much as digits as its factorization.

1316531131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 810, while the sum is 25.

The square root of 1316531131 is about 36284.0341059260. The cubic root of 1316531131 is about 1095.9995546178. Note that the first 3 decimals are identical.

Adding to 1316531131 its reverse (1311356131), we get a palindrome (2627887262).

The spelling of 1316531131 in words is "one billion, three hundred sixteen million, five hundred thirty-one thousand, one hundred thirty-one".