71311245155471 has 2 divisors, whose sum is σ = 71311245155472. Its totient is φ = 71311245155470.

The previous prime is 71311245155459. The next prime is 71311245155477. The reversal of 71311245155471 is 17455154211317.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71311245155471 - 2²² = 71311240961167 is a prime.

It is a super-3 number, since 3×71311245155471³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71311245155477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35655622577735 + 35655622577736.

It is an arithmetic number, because the mean of its divisors is an integer number (35655622577736).

Almost surely, 2^{71311245155471} is an apocalyptic number.

71311245155471 is a deficient number, since it is larger than the sum of its proper divisors (1).

71311245155471 is an equidigital number, since it uses as much as digits as its factorization.

71311245155471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 588000, while the sum is 47.

Adding to 71311245155471 its reverse (17455154211317), we get a palindrome (88766399366788).

The spelling of 71311245155471 in words is "seventy-one trillion, three hundred eleven billion, two hundred forty-five million, one hundred fifty-five thousand, four hundred seventy-one".