2216771 has 4 divisors (see below), whose sum is σ = 2223000. Its totient is φ = 2210544.

The previous prime is 2216761. The next prime is 2216777. The reversal of 2216771 is 1776122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1776122 = 2 ⋅888061.

It is a cyclic number.

It is not a de Polignac number, because 2216771 - 2¹⁸ = 1954627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2216771.

It is not an unprimeable number, because it can be changed into a prime (2216777) 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, 2546 + ... + 3303.

It is an arithmetic number, because the mean of its divisors is an integer number (555750).

2^2216771 is an apocalyptic number.

2216771 is a deficient number, since it is larger than the sum of its proper divisors (6229).

2216771 is an equidigital number, since it uses as much as digits as its factorization.

2216771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6228.

The product of its digits is 1176, while the sum is 26.

The square root of 2216771 is about 1488.8824668187. The cubic root of 2216771 is about 130.3887966023.

The spelling of 2216771 in words is "two million, two hundred sixteen thousand, seven hundred seventy-one".