8172229 has 16 divisors (see below), whose sum is σ = 9298800. Its totient is φ = 7128576.

The previous prime is 8172211. The next prime is 8172233. The reversal of 8172229 is 9222718.

It can be written as a sum of positive squares in 8 ways, for example, as 248004 + 7924225 = 498^2 + 2815^2 .

It is not a de Polignac number, because 8172229 - 2⁹ = 8171717 is a prime.

It is a Duffinian number.

Its product of digits (4032) is a multiple of the sum of its prime divisors (504).

It is a self number, because there is not a number n which added to its sum of digits gives 8172229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8172209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19777 + ... + 20185.

It is an arithmetic number, because the mean of its divisors is an integer number (581175).

Almost surely, 2^8172229 is an apocalyptic number.

It is an amenable number.

8172229 is a deficient number, since it is larger than the sum of its proper divisors (1126571).

8172229 is a wasteful number, since it uses less digits than its factorization.

8172229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504.

The product of its digits is 4032, while the sum is 31.

The square root of 8172229 is about 2858.7110731937. The cubic root of 8172229 is about 201.4250635196.

The spelling of 8172229 in words is "eight million, one hundred seventy-two thousand, two hundred twenty-nine".