8232821172 has 36 divisors (see below), whose sum is σ = 20821243716. Its totient is φ = 2742888960.

The previous prime is 8232821171. The next prime is 8232821173. The reversal of 8232821172 is 2711282328.

It is an interprime number because it is at equal distance from previous prime (8232821171) and next prime (8232821173).

It can be written as a sum of positive squares in 2 ways, for example, as 7500252816 + 732568356 = 86604^2 + 27066^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8232821171) 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 11 ways as a sum of consecutive naturals, for example, 15922 + ... + 129302.

It is an arithmetic number, because the mean of its divisors is an integer number (578367881).

Almost surely, 2^8232821172 is an apocalyptic number.

It is an amenable number.

8232821172 is an abundant number, since it is smaller than the sum of its proper divisors (12588422544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8232821172 is a wasteful number, since it uses less digits than its factorization.

8232821172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115408 (or 115403 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 8232821172 is about 90734.8950073785. The cubic root of 8232821172 is about 2019.2165353683.

The spelling of 8232821172 in words is "eight billion, two hundred thirty-two million, eight hundred twenty-one thousand, one hundred seventy-two".