71172116 has 12 divisors (see below), whose sum is σ = 126593460. Its totient is φ = 35002560.

The previous prime is 71172107. The next prime is 71172161. The reversal of 71172116 is 61127117.

It can be written as a sum of positive squares in 2 ways, for example, as 7236100 + 63936016 = 2690^2 + 7996^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145601 + ... + 146088.

It is an arithmetic number, because the mean of its divisors is an integer number (10549455).

Almost surely, 2^71172116 is an apocalyptic number.

It is an amenable number.

71172116 is a deficient number, since it is larger than the sum of its proper divisors (55421344).

71172116 is a wasteful number, since it uses less digits than its factorization.

71172116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291754 (or 291752 counting only the distinct ones).

The product of its digits is 588, while the sum is 26.

The square root of 71172116 is about 8436.3567966273. The cubic root of 71172116 is about 414.4161063318.

It can be divided in two parts, 711 and 72116, that added together give a palindrome (72827).

The spelling of 71172116 in words is "seventy-one million, one hundred seventy-two thousand, one hundred sixteen".