71313231317 has 2 divisors, whose sum is σ = 71313231318. Its totient is φ = 71313231316.

The previous prime is 71313231313. The next prime is 71313231323.

71313231317 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41162728996 + 30150502321 = 202886^2 + 173639^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 71313231317 - 2² = 71313231313 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71313231313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35656615658 + 35656615659.

It is an arithmetic number, because the mean of its divisors is an integer number (35656615659).

Almost surely, 2^71313231317 is an apocalyptic number.

It is an amenable number.

71313231317 is a deficient number, since it is larger than the sum of its proper divisors (1).

71313231317 is an equidigital number, since it uses as much as digits as its factorization.

71313231317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7938, while the sum is 32.

The spelling of 71313231317 in words is "seventy-one billion, three hundred thirteen million, two hundred thirty-one thousand, three hundred seventeen".