2216657 has 2 divisors, whose sum is σ = 2216658. Its totient is φ = 2216656.

The previous prime is 2216653. The next prime is 2216659. The reversal of 2216657 is 7566122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2119936 + 96721 = 1456^2 + 311^2 .

It is a cyclic number.

It is not a de Polignac number, because 2216657 - 2² = 2216653 is a prime.

Together with 2216659, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2216653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108328 + 1108329.

It is an arithmetic number, because the mean of its divisors is an integer number (1108329).

2^2216657 is an apocalyptic number.

It is an amenable number.

2216657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2216657 is an equidigital number, since it uses as much as digits as its factorization.

2216657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 2216657 is about 1488.8441825792. The cubic root of 2216657 is about 130.3865614327.

The spelling of 2216657 in words is "two million, two hundred sixteen thousand, six hundred fifty-seven".