1316312161 has 2 divisors, whose sum is σ = 1316312162. Its totient is φ = 1316312160.

The previous prime is 1316312131. The next prime is 1316312167. The reversal of 1316312161 is 1612136131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1089990225 + 226321936 = 33015^2 + 15044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1316312161 is a prime.

It is a super-3 number, since 3×1316312161³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1316312167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658156080 + 658156081.

It is an arithmetic number, because the mean of its divisors is an integer number (658156081).

Almost surely, 2^1316312161 is an apocalyptic number.

It is an amenable number.

1316312161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316312161 is an equidigital number, since it uses as much as digits as its factorization.

1316312161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 1316312161 is about 36281.0165375779. The cubic root of 1316312161 is about 1095.9387877729.

Adding to 1316312161 its reverse (1612136131), we get a palindrome (2928448292).

The spelling of 1316312161 in words is "one billion, three hundred sixteen million, three hundred twelve thousand, one hundred sixty-one".