71711171 has 16 divisors (see below), whose sum is σ = 88473600. Its totient is φ = 56763168.

The previous prime is 71711147. The next prime is 71711179. The reversal of 71711171 is 17111717.

It is a de Polignac number, because none of the positive numbers 2^k-71711171 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71711171.

It is not an unprimeable number, because it can be changed into a prime (71711179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3011 + ... + 12348.

It is an arithmetic number, because the mean of its divisors is an integer number (5529600).

Almost surely, 2^71711171 is an apocalyptic number.

71711171 is a deficient number, since it is larger than the sum of its proper divisors (16762429).

71711171 is a wasteful number, since it uses less digits than its factorization.

71711171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15418.

The product of its digits is 343, while the sum is 26.

The square root of 71711171 is about 8468.2448594735. The cubic root of 71711171 is about 415.4597334225.

Adding to 71711171 its reverse (17111717), we get a palindrome (88822888).

The spelling of 71711171 in words is "seventy-one million, seven hundred eleven thousand, one hundred seventy-one".