2216306 has 8 divisors (see below), whose sum is σ = 3401904. Its totient is φ = 1082340.

The previous prime is 2216299. The next prime is 2216309. The reversal of 2216306 is 6036122.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2216309) 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, 12800 + ... + 12971.

It is an arithmetic number, because the mean of its divisors is an integer number (425238).

2^2216306 is an apocalyptic number.

2216306 is a deficient number, since it is larger than the sum of its proper divisors (1185598).

2216306 is a wasteful number, since it uses less digits than its factorization.

2216306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25816.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2216306 is about 1488.7263012387. The cubic root of 2216306 is about 130.3796789818.

The spelling of 2216306 in words is "two million, two hundred sixteen thousand, three hundred six".