2216671 has 4 divisors (see below), whose sum is σ = 2313072. Its totient is φ = 2120272.

The previous prime is 2216659. The next prime is 2216699. The reversal of 2216671 is 1766122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1766122 = 2 ⋅883061.

It is a cyclic number.

It is not a de Polignac number, because 2216671 - 2¹¹ = 2214623 is a prime.

It is an Ulam number.

It is a Duffinian number.

2216671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216611) 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 3 ways as a sum of consecutive naturals, for example, 48166 + ... + 48211.

It is an arithmetic number, because the mean of its divisors is an integer number (578268).

2^2216671 is an apocalyptic number.

2216671 is a deficient number, since it is larger than the sum of its proper divisors (96401).

2216671 is an equidigital number, since it uses as much as digits as its factorization.

2216671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96400.

The product of its digits is 1008, while the sum is 25.

The square root of 2216671 is about 1488.8488842055. The cubic root of 2216671 is about 130.3868359313.

The spelling of 2216671 in words is "two million, two hundred sixteen thousand, six hundred seventy-one".