2171399936 has 72 divisors (see below), whose sum is σ = 4618941264. Its totient is φ = 1015234560.

The previous prime is 2171399927. The next prime is 2171399947. The reversal of 2171399936 is 6399931712.

It is a congruent number.

It is an unprimeable number.

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, 707846 + ... + 710906.

It is an arithmetic number, because the mean of its divisors is an integer number (64151962).

Almost surely, 2^2171399936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2171399936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2309470632).

2171399936 is an abundant number, since it is smaller than the sum of its proper divisors (2447541328).

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

2171399936 is a wasteful number, since it uses less digits than its factorization.

2171399936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3257 (or 3243 counting only the distinct ones).

The product of its digits is 551124, while the sum is 50.

The square root of 2171399936 is about 46598.2825434586. The cubic root of 2171399936 is about 1294.9309377162.

The spelling of 2171399936 in words is "two billion, one hundred seventy-one million, three hundred ninety-nine thousand, nine hundred thirty-six".