71297118331 has 2 divisors, whose sum is σ = 71297118332. Its totient is φ = 71297118330.

The previous prime is 71297118301. The next prime is 71297118349. The reversal of 71297118331 is 13381179217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71297118331 - 2²⁷ = 71162900603 is a prime.

It is a super-2 number, since 2×71297118331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71297118301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35648559165 + 35648559166.

It is an arithmetic number, because the mean of its divisors is an integer number (35648559166).

Almost surely, 2^71297118331 is an apocalyptic number.

71297118331 is a deficient number, since it is larger than the sum of its proper divisors (1).

71297118331 is an equidigital number, since it uses as much as digits as its factorization.

71297118331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 43.

The spelling of 71297118331 in words is "seventy-one billion, two hundred ninety-seven million, one hundred eighteen thousand, three hundred thirty-one".