2216447 has 4 divisors (see below), whose sum is σ = 2227896. Its totient is φ = 2205000.

The previous prime is 2216437. The next prime is 2216471. The reversal of 2216447 is 7446122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7446122 = 2 ⋅3723061.

It is a cyclic number.

It is not a de Polignac number, because 2216447 - 2¹² = 2212351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216437) 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, 5429 + ... + 5822.

It is an arithmetic number, because the mean of its divisors is an integer number (556974).

2^2216447 is an apocalyptic number.

2216447 is a deficient number, since it is larger than the sum of its proper divisors (11449).

2216447 is a wasteful number, since it uses less digits than its factorization.

2216447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11448.

The product of its digits is 2688, while the sum is 26.

The square root of 2216447 is about 1488.7736564031. The cubic root of 2216447 is about 130.3824438143.

The spelling of 2216447 in words is "two million, two hundred sixteen thousand, four hundred forty-seven".