2172665322 has 16 divisors (see below), whose sum is σ = 4828145280. Its totient is φ = 724221756.

The previous prime is 2172665321. The next prime is 2172665329. The reversal of 2172665322 is 2235662712.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2172665321) 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 7 ways as a sum of consecutive naturals, for example, 20117218 + ... + 20117325.

It is an arithmetic number, because the mean of its divisors is an integer number (301759080).

Almost surely, 2^2172665322 is an apocalyptic number.

2172665322 is an abundant number, since it is smaller than the sum of its proper divisors (2655479958).

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

2172665322 is a wasteful number, since it uses less digits than its factorization.

2172665322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40234554 (or 40234548 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 2172665322 is about 46611.8581693543. The cubic root of 2172665322 is about 1295.1824297389.

The spelling of 2172665322 in words is "two billion, one hundred seventy-two million, six hundred sixty-five thousand, three hundred twenty-two".