2181825792 has 108 divisors (see below), whose sum is σ = 6370902720. Its totient is φ = 718009344.

The previous prime is 2181825769. The next prime is 2181825881. The reversal of 2181825792 is 2975281812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176023 + ... + 188009.

It is an arithmetic number, because the mean of its divisors is an integer number (58989840).

Almost surely, 2^2181825792 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 2181825792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3185451360).

2181825792 is an abundant number, since it is smaller than the sum of its proper divisors (4189076928).

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

2181825792 is a wasteful number, since it uses less digits than its factorization.

2181825792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12088 (or 12071 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 2181825792 is about 46710.0181117499. The cubic root of 2181825792 is about 1297.0001424714. Note that the first 3 decimals are identical.

The spelling of 2181825792 in words is "two billion, one hundred eighty-one million, eight hundred twenty-five thousand, seven hundred ninety-two".