2218417 has 4 divisors (see below), whose sum is σ = 2229876. Its totient is φ = 2206960.

The previous prime is 2218367. The next prime is 2218423. The reversal of 2218417 is 7148122.

It is a happy number.

2218417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7148122 = 2 ⋅3574061.

It can be written as a sum of positive squares in 2 ways, for example, as 2187441 + 30976 = 1479^2 + 176^2 .

It is a cyclic number.

It is not a de Polignac number, because 2218417 - 2⁷ = 2218289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2218391 and 2218400.

It is not an unprimeable number, because it can be changed into a prime (2218427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5434 + ... + 5827.

It is an arithmetic number, because the mean of its divisors is an integer number (557469).

2^2218417 is an apocalyptic number.

It is an amenable number.

2218417 is a deficient number, since it is larger than the sum of its proper divisors (11459).

2218417 is a wasteful number, since it uses less digits than its factorization.

2218417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11458.

The product of its digits is 896, while the sum is 25.

The square root of 2218417 is about 1489.4351278253. The cubic root of 2218417 is about 130.4210607771.

It can be divided in two parts, 22184 and 17, that added together give a square (22201 = 149²).

The spelling of 2218417 in words is "two million, two hundred eighteen thousand, four hundred seventeen".