2181647104 has 144 divisors (see below), whose sum is σ = 5439329280. Its totient is φ = 850268160.

The previous prime is 2181647087. The next prime is 2181647107. The reversal of 2181647104 is 4017461812.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2181647104.

It is not an unprimeable number, because it can be changed into a prime (2181647107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1653357 + ... + 1654675.

It is an arithmetic number, because the mean of its divisors is an integer number (37773120).

Almost surely, 2^2181647104 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 2181647104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2719664640).

2181647104 is an abundant number, since it is smaller than the sum of its proper divisors (3257682176).

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

2181647104 is a wasteful number, since it uses less digits than its factorization.

2181647104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426 (or 1412 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 2181647104 is about 46708.1053351557. The cubic root of 2181647104 is about 1296.9647341008.

The spelling of 2181647104 in words is "two billion, one hundred eighty-one million, six hundred forty-seven thousand, one hundred four".