71081711 has 4 divisors (see below), whose sum is σ = 71098800. Its totient is φ = 71064624.

The previous prime is 71081701. The next prime is 71081767. The reversal of 71081711 is 11718017.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71081711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71081701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2195 + ... + 12123.

It is an arithmetic number, because the mean of its divisors is an integer number (17774700).

Almost surely, 2^71081711 is an apocalyptic number.

71081711 is a deficient number, since it is larger than the sum of its proper divisors (17089).

71081711 is an equidigital number, since it uses as much as digits as its factorization.

71081711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17088.

The product of its (nonzero) digits is 392, while the sum is 26.

The square root of 71081711 is about 8430.9970347522. The cubic root of 71081711 is about 414.2405639771.

Adding to 71081711 its reverse (11718017), we get a palindrome (82799728).

The spelling of 71081711 in words is "seventy-one million, eighty-one thousand, seven hundred eleven".