2171809060 has 96 divisors (see below), whose sum is σ = 4922830080. Its totient is φ = 802368000.

The previous prime is 2171809051. The next prime is 2171809069. The reversal of 2171809060 is 609081712.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2171809051) and next prime (2171809069).

It is not an unprimeable number, because it can be changed into a prime (2171809069) 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 31 ways as a sum of consecutive naturals, for example, 2724582 + ... + 2725378.

It is an arithmetic number, because the mean of its divisors is an integer number (51279480).

Almost surely, 2^2171809060 is an apocalyptic number.

2171809060 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 2171809060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2461415040).

2171809060 is an abundant number, since it is smaller than the sum of its proper divisors (2751021020).

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

2171809060 is a wasteful number, since it uses less digits than its factorization.

2171809060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 2171809060 is about 46602.6722409778. The cubic root of 2171809060 is about 1295.0122606831.

The spelling of 2171809060 in words is "two billion, one hundred seventy-one million, eight hundred nine thousand, sixty".