71306012431 has 2 divisors, whose sum is σ = 71306012432. Its totient is φ = 71306012430.

The previous prime is 71306012413. The next prime is 71306012441. The reversal of 71306012431 is 13421060317.

Together with previous prime (71306012413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71306012431 - 2⁹ = 71306011919 is a prime.

It is a super-2 number, since 2×71306012431² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71306012431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71306012441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35653006215 + 35653006216.

It is an arithmetic number, because the mean of its divisors is an integer number (35653006216).

Almost surely, 2^71306012431 is an apocalyptic number.

71306012431 is a deficient number, since it is larger than the sum of its proper divisors (1).

71306012431 is an equidigital number, since it uses as much as digits as its factorization.

71306012431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 71306012431 its reverse (13421060317), we get a palindrome (84727072748).

The spelling of 71306012431 in words is "seventy-one billion, three hundred six million, twelve thousand, four hundred thirty-one".