2171930880 has 576 divisors, whose sum is σ = 8653478400. Its totient is φ = 462422016.

The previous prime is 2171930857. The next prime is 2171930881. The reversal of 2171930880 is 880391712.

It is not an unprimeable number, because it can be changed into a prime (2171930881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22390992 + ... + 22391088.

It is an arithmetic number, because the mean of its divisors is an integer number (15023400).

Almost surely, 2^2171930880 is an apocalyptic number.

2171930880 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 2171930880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4326739200).

2171930880 is an abundant number, since it is smaller than the sum of its proper divisors (6481547520).

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

2171930880 is an equidigital number, since it uses as much as digits as its factorization.

2171930880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 2171930880 is about 46603.9792292461. The cubic root of 2171930880 is about 1295.0364732849.

The spelling of 2171930880 in words is "two billion, one hundred seventy-one million, nine hundred thirty thousand, eight hundred eighty".