2216857 has 2 divisors, whose sum is σ = 2216858. Its totient is φ = 2216856.

The previous prime is 2216839. The next prime is 2216861. The reversal of 2216857 is 7586122.

2216857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1915456 + 301401 = 1384^2 + 549^2 .

It is a cyclic number.

It is not a de Polignac number, because 2216857 - 2⁷ = 2216729 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2² + 2¹⁰ + 1 + 6³ + 8⁶ + 5⁹ + 7³ .

It is not a weakly prime, because it can be changed into another prime (2216887) 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 as a sum of consecutive naturals, namely, 1108428 + 1108429.

It is an arithmetic number, because the mean of its divisors is an integer number (1108429).

2^2216857 is an apocalyptic number.

It is an amenable number.

2216857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2216857 is an equidigital number, since it uses as much as digits as its factorization.

2216857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 31.

The square root of 2216857 is about 1488.9113472601. The cubic root of 2216857 is about 130.3904827322.

The spelling of 2216857 in words is "two million, two hundred sixteen thousand, eight hundred fifty-seven".