2216186280 has 384 divisors, whose sum is σ = 9273139200. Its totient is φ = 445478400.

The previous prime is 2216186233. The next prime is 2216186281. The reversal of 2216186280 is 826816122.

2216186280 is a `hidden beast` number, since 2 + 2 + 16 + 18 + 628 + 0 = 666.

It is a super-2 number, since 2×2216186280² = 9822963255320476800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2216186281) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 858031 + ... + 860609.

It is an arithmetic number, because the mean of its divisors is an integer number (24148800).

Almost surely, 2^2216186280 is an apocalyptic number.

2216186280 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 2216186280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4636569600).

2216186280 is an abundant number, since it is smaller than the sum of its proper divisors (7056952920).

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

2216186280 is a wasteful number, since it uses less digits than its factorization.

2216186280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645 (or 2638 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 2216186280 is about 47076.3877118880. The cubic root of 2216186280 is about 1303.7733133120.

The spelling of 2216186280 in words is "two billion, two hundred sixteen million, one hundred eighty-six thousand, two hundred eighty".