71172030705431 has 2 divisors, whose sum is σ = 71172030705432. Its totient is φ = 71172030705430.

The previous prime is 71172030705371. The next prime is 71172030705463. The reversal of 71172030705431 is 13450703027117.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71172030705431 - 2²² = 71172026511127 is a prime.

It is a super-2 number, since 2×71172030705431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71172030705731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35586015352715 + 35586015352716.

It is an arithmetic number, because the mean of its divisors is an integer number (35586015352716).

Almost surely, 2^{71172030705431} is an apocalyptic number.

71172030705431 is a deficient number, since it is larger than the sum of its proper divisors (1).

71172030705431 is an equidigital number, since it uses as much as digits as its factorization.

71172030705431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 123480, while the sum is 41.

The spelling of 71172030705431 in words is "seventy-one trillion, one hundred seventy-two billion, thirty million, seven hundred five thousand, four hundred thirty-one".