2219306 has 4 divisors (see below), whose sum is σ = 3328962. Its totient is φ = 1109652.

The previous prime is 2219281. The next prime is 2219309. The reversal of 2219306 is 6039122.

2219306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2175625 + 43681 = 1475^2 + 209^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2219309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554825 + ... + 554828.

2^2219306 is an apocalyptic number.

2219306 is a deficient number, since it is larger than the sum of its proper divisors (1109656).

2219306 is a wasteful number, since it uses less digits than its factorization.

2219306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109655.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 2219306 is about 1489.7335332200. The cubic root of 2219306 is about 130.4384799306.

The spelling of 2219306 in words is "two million, two hundred nineteen thousand, three hundred six".