2179271808 has 192 divisors, whose sum is σ = 7303608000. Its totient is φ = 610781184.

The previous prime is 2179271791. The next prime is 2179271813. The reversal of 2179271808 is 8081729712.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×2179271808² = 9498451226287177728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 424843 + ... + 429941.

It is an arithmetic number, because the mean of its divisors is an integer number (38039625).

Almost surely, 2^2179271808 is an apocalyptic number.

2179271808 is a gapful number since it is divisible by the number (28) 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 2179271808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3651804000).

2179271808 is an abundant number, since it is smaller than the sum of its proper divisors (5124336192).

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

2179271808 is a wasteful number, since it uses less digits than its factorization.

2179271808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5179 (or 5164 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The square root of 2179271808 is about 46682.6713888569. The cubic root of 2179271808 is about 1296.4938675618.

It can be divided in two parts, 217 and 9271808, that added together give a square (9272025 = 3045²).

The spelling of 2179271808 in words is "two billion, one hundred seventy-nine million, two hundred seventy-one thousand, eight hundred eight".