2171207216 has 20 divisors (see below), whose sum is σ = 4428120600. Its totient is φ = 1028466432.

The previous prime is 2171207183. The next prime is 2171207237. The reversal of 2171207216 is 6127021712.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3570761 + ... + 3571368.

It is an arithmetic number, because the mean of its divisors is an integer number (221406030).

Almost surely, 2^2171207216 is an apocalyptic number.

It is an amenable number.

2171207216 is an abundant number, since it is smaller than the sum of its proper divisors (2256913384).

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

2171207216 is a wasteful number, since it uses less digits than its factorization.

2171207216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7142156 (or 7142150 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 2171207216 is about 46596.2146102020. The cubic root of 2171207216 is about 1294.8926265681.

Adding to 2171207216 its reverse (6127021712), we get a palindrome (8298228928).

The spelling of 2171207216 in words is "two billion, one hundred seventy-one million, two hundred seven thousand, two hundred sixteen".