2221306 has 8 divisors (see below), whose sum is σ = 3379104. Its totient is φ = 1094940.

The previous prime is 2221301. The next prime is 2221321. The reversal of 2221306 is 6031222.

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

It is a d-powerful number, because it can be written as 2³ + 2¹¹ + 2¹³ + 1 + 3¹² + 0 + 6⁸ .

It is a self number, because there is not a number n which added to its sum of digits gives 2221306.

It is not an unprimeable number, because it can be changed into a prime (2221301) 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, 7680 + ... + 7963.

It is an arithmetic number, because the mean of its divisors is an integer number (422388).

2^2221306 is an apocalyptic number.

2221306 is a deficient number, since it is larger than the sum of its proper divisors (1157798).

2221306 is a wasteful number, since it uses less digits than its factorization.

2221306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15716.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2221306 is about 1490.4046430416. The cubic root of 2221306 is about 130.4776511300.

Adding to 2221306 its reverse (6031222), we get a palindrome (8252528).

The spelling of 2221306 in words is "two million, two hundred twenty-one thousand, three hundred six".