8212171172 has 12 divisors (see below), whose sum is σ = 14372446620. Its totient is φ = 4105757856.

The previous prime is 8212171171. The next prime is 8212171189. The reversal of 8212171172 is 2711712128.

It can be written as a sum of positive squares in 2 ways, for example, as 5237995876 + 2974175296 = 72374^2 + 54536^2 .

It is not an unprimeable number, because it can be changed into a prime (8212171171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20423 + ... + 129774.

It is an arithmetic number, because the mean of its divisors is an integer number (1197703885).

Almost surely, 2^8212171172 is an apocalyptic number.

It is an amenable number.

8212171172 is a deficient number, since it is larger than the sum of its proper divisors (6160275448).

8212171172 is a wasteful number, since it uses less digits than its factorization.

8212171172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163870 (or 163868 counting only the distinct ones).

The product of its digits is 3136, while the sum is 32.

The square root of 8212171172 is about 90621.0305172039. The cubic root of 8212171172 is about 2017.5268864495.

The spelling of 8212171172 in words is "eight billion, two hundred twelve million, one hundred seventy-one thousand, one hundred seventy-two".