222116566 has 16 divisors (see below), whose sum is σ = 397327104. Its totient is φ = 91053864.

The previous prime is 222116537. The next prime is 222116569. The reversal of 222116566 is 665611222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222116569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344580 + ... + 345223.

It is an arithmetic number, because the mean of its divisors is an integer number (24832944).

Almost surely, 2^222116566 is an apocalyptic number.

222116566 is a deficient number, since it is larger than the sum of its proper divisors (175210538).

222116566 is a wasteful number, since it uses less digits than its factorization.

222116566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689835.

The product of its digits is 8640, while the sum is 31.

The square root of 222116566 is about 14903.5756112418. The cubic root of 222116566 is about 605.6108540111.

Adding to 222116566 its reverse (665611222), we get a palindrome (887727788).

The spelling of 222116566 in words is "two hundred twenty-two million, one hundred sixteen thousand, five hundred sixty-six".