2219866 has 12 divisors (see below), whose sum is σ = 3660426. Its totient is φ = 1008920.

The previous prime is 2219849. The next prime is 2219869. The reversal of 2219866 is 6689122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2205225 + 14641 = 1485^2 + 121^2 .

It is a d-powerful number, because it can be written as 2⁹ + 2⁹ + 1 + 9⁶ + 8 + 6⁵ + 6⁸ .

It is not an unprimeable number, because it can be changed into a prime (2219869) 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 5 ways as a sum of consecutive naturals, for example, 4345 + ... + 4828.

2^2219866 is an apocalyptic number.

2219866 is a deficient number, since it is larger than the sum of its proper divisors (1440560).

2219866 is a wasteful number, since it uses less digits than its factorization.

2219866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9197 (or 9186 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 2219866 is about 1489.9214744409. The cubic root of 2219866 is about 130.4494502378.

The spelling of 2219866 in words is "two million, two hundred nineteen thousand, eight hundred sixty-six".