222875866 has 8 divisors (see below), whose sum is σ = 334405044. Its totient is φ = 111407520.

The previous prime is 222875843. The next prime is 222875867. The reversal of 222875866 is 668578222.

222875866 = T₁₂₁₈₈ + T₁₂₁₈₉ + T₁₂₁₉₀.

It can be written as a sum of positive squares in 2 ways, for example, as 221146641 + 1729225 = 14871^2 + 1315^2 .

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 (222875867) by changing a digit.

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, 4555 + ... + 21598.

Almost surely, 2^222875866 is an apocalyptic number.

222875866 is the 12190-th centered triangular number.

222875866 is a deficient number, since it is larger than the sum of its proper divisors (111529178).

222875866 is a wasteful number, since it uses less digits than its factorization.

222875866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30416.

The product of its digits is 645120, while the sum is 46.

The square root of 222875866 is about 14929.0276307601. The cubic root of 222875866 is about 606.3001577377.

The spelling of 222875866 in words is "two hundred twenty-two million, eight hundred seventy-five thousand, eight hundred sixty-six".