2216223221172 has 24 divisors (see below), whose sum is σ = 5176061426592. Its totient is φ = 738044800800.

The previous prime is 2216223221143. The next prime is 2216223221207. The reversal of 2216223221172 is 2711223226122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87020854 + ... + 87046317.

It is an arithmetic number, because the mean of its divisors is an integer number (215669226108).

Almost surely, 2^{2216223221172} is an apocalyptic number.

It is an amenable number.

2216223221172 is an abundant number, since it is smaller than the sum of its proper divisors (2959838205420).

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

2216223221172 is a wasteful number, since it uses less digits than its factorization.

2216223221172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174068239 (or 174068237 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

Adding to 2216223221172 its reverse (2711223226122), we get a palindrome (4927446447294).

The spelling of 2216223221172 in words is "two trillion, two hundred sixteen billion, two hundred twenty-three million, two hundred twenty-one thousand, one hundred seventy-two".