71126185331 has 2 divisors, whose sum is σ = 71126185332. Its totient is φ = 71126185330.

The previous prime is 71126185313. The next prime is 71126185409. The reversal of 71126185331 is 13358162117.

Together with previous prime (71126185313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71126185331 is a prime.

It is a super-2 number, since 2×71126185331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71126185631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35563092665 + 35563092666.

It is an arithmetic number, because the mean of its divisors is an integer number (35563092666).

Almost surely, 2^71126185331 is an apocalyptic number.

71126185331 is a deficient number, since it is larger than the sum of its proper divisors (1).

71126185331 is an equidigital number, since it uses as much as digits as its factorization.

71126185331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The spelling of 71126185331 in words is "seventy-one billion, one hundred twenty-six million, one hundred eighty-five thousand, three hundred thirty-one".