222111866 has 8 divisors (see below), whose sum is σ = 334550964. Its totient is φ = 110594880.

The previous prime is 222111863. The next prime is 222111887. The reversal of 222111866 is 668111222.

It can be written as a sum of positive squares in 2 ways, for example, as 219484225 + 2627641 = 14815^2 + 1621^2 .

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

It is not an unprimeable number, because it can be changed into a prime (222111863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229925 + ... + 230888.

Almost surely, 2^222111866 is an apocalyptic number.

222111866 is a deficient number, since it is larger than the sum of its proper divisors (112439098).

222111866 is a wasteful number, since it uses less digits than its factorization.

222111866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461056.

The product of its digits is 2304, while the sum is 29.

The square root of 222111866 is about 14903.4179301260. The cubic root of 222111866 is about 605.6065823935.

The spelling of 222111866 in words is "two hundred twenty-two million, one hundred eleven thousand, eight hundred sixty-six".