2217821982 has 8 divisors (see below), whose sum is σ = 4435643976. Its totient is φ = 739273992.

The previous prime is 2217821971. The next prime is 2217821999. The reversal of 2217821982 is 2891287122.

It is a sphenic number, since it is the product of 3 distinct primes.

2217821982 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 184818493 + ... + 184818504.

It is an arithmetic number, because the mean of its divisors is an integer number (554455497).

Almost surely, 2^2217821982 is an apocalyptic number.

2217821982 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2217821982 is a wasteful number, since it uses less digits than its factorization.

2217821982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369637002.

The product of its digits is 64512, while the sum is 42.

The square root of 2217821982 is about 47093.7573570001. The cubic root of 2217821982 is about 1304.0939933596.

The spelling of 2217821982 in words is "two billion, two hundred seventeen million, eight hundred twenty-one thousand, nine hundred eighty-two".