2173321209 has 16 divisors (see below), whose sum is σ = 2912345280. Its totient is φ = 1441604160.

The previous prime is 2173321187. The next prime is 2173321211. The reversal of 2173321209 is 9021233712.

It is not a de Polignac number, because 2173321209 - 2⁵ = 2173321177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2173371209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 900214 + ... + 902624.

It is an arithmetic number, because the mean of its divisors is an integer number (182021580).

Almost surely, 2^2173321209 is an apocalyptic number.

It is an amenable number.

2173321209 is a deficient number, since it is larger than the sum of its proper divisors (739024071).

2173321209 is a wasteful number, since it uses less digits than its factorization.

2173321209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3800.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 2173321209 is about 46618.8932622815. The cubic root of 2173321209 is about 1295.3127470719.

The spelling of 2173321209 in words is "two billion, one hundred seventy-three million, three hundred twenty-one thousand, two hundred nine".