216549222244 has 6 divisors (see below), whose sum is σ = 378961138934. Its totient is φ = 108274611120.

The previous prime is 216549222223. The next prime is 216549222247. The reversal of 216549222244 is 442222945612.

It can be written as a sum of positive squares in only one way, i.e., 193212993600 + 23336228644 = 439560^2 + 152762^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 216549222244.

It is not an unprimeable number, because it can be changed into a prime (216549222247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27068652777 + ... + 27068652784.

Almost surely, 2^216549222244 is an apocalyptic number.

It is an amenable number.

216549222244 is a deficient number, since it is larger than the sum of its proper divisors (162411916690).

216549222244 is a wasteful number, since it uses less digits than its factorization.

216549222244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54137305565 (or 54137305563 counting only the distinct ones).

The product of its digits is 552960, while the sum is 43.

The spelling of 216549222244 in words is "two hundred sixteen billion, five hundred forty-nine million, two hundred twenty-two thousand, two hundred forty-four".