2216917 has 2 divisors, whose sum is σ = 2216918. Its totient is φ = 2216916.

The previous prime is 2216909. The next prime is 2216941. The reversal of 2216917 is 7196122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1164241 + 1052676 = 1079^2 + 1026^2 .

It is a cyclic number.

It is not a de Polignac number, because 2216917 - 2³ = 2216909 is a prime.

2216917 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2216957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108458 + 1108459.

It is an arithmetic number, because the mean of its divisors is an integer number (1108459).

2^2216917 is an apocalyptic number.

It is an amenable number.

2216917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2216917 is an equidigital number, since it uses as much as digits as its factorization.

2216917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 2216917 is about 1488.9314960736. The cubic root of 2216917 is about 130.3916590761.

The spelling of 2216917 in words is "two million, two hundred sixteen thousand, nine hundred seventeen".