71317511 has 2 divisors, whose sum is σ = 71317512. Its totient is φ = 71317510.

The previous prime is 71317483. The next prime is 71317523. The reversal of 71317511 is 11571317.

It is a strong prime.

It is an emirp because it is prime and its reverse (11571317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71317511 - 2¹⁸ = 71055367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71317531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35658755 + 35658756.

It is an arithmetic number, because the mean of its divisors is an integer number (35658756).

Almost surely, 2^71317511 is an apocalyptic number.

71317511 is a deficient number, since it is larger than the sum of its proper divisors (1).

71317511 is an equidigital number, since it uses as much as digits as its factorization.

71317511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 735, while the sum is 26.

The square root of 71317511 is about 8444.9695677368. The cubic root of 71317511 is about 414.6981130566.

Adding to 71317511 its reverse (11571317), we get a palindrome (82888828).

The spelling of 71317511 in words is "seventy-one million, three hundred seventeen thousand, five hundred eleven".