2173209120 has 288 divisors, whose sum is σ = 7755471360. Its totient is φ = 553512960.

The previous prime is 2173209091. The next prime is 2173209139. The reversal of 2173209120 is 219023712.

2173209120 is a `hidden beast` number, since 217 + 320 + 9 + 120 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3972687 + ... + 3973233.

It is an arithmetic number, because the mean of its divisors is an integer number (26928720).

Almost surely, 2^2173209120 is an apocalyptic number.

2173209120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2173209120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3877735680).

2173209120 is an abundant number, since it is smaller than the sum of its proper divisors (5582262240).

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

2173209120 is a wasteful number, since it uses less digits than its factorization.

2173209120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 2173209120 is about 46617.6910625140. The cubic root of 2173209120 is about 1295.2904781123.

The spelling of 2173209120 in words is "two billion, one hundred seventy-three million, two hundred nine thousand, one hundred twenty".