2143217 has 2 divisors, whose sum is σ = 2143218. Its totient is φ = 2143216.

The previous prime is 2143201. The next prime is 2143223. The reversal of 2143217 is 7123412.

2143217 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., 2085136 + 58081 = 1444^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143217 - 2⁴ = 2143201 is a prime.

It is not a weakly prime, because it can be changed into another prime (2143417) 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, 1071608 + 1071609.

It is an arithmetic number, because the mean of its divisors is an integer number (1071609).

2^2143217 is an apocalyptic number.

It is an amenable number.

2143217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143217 is an equidigital number, since it uses as much as digits as its factorization.

2143217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 20.

The square root of 2143217 is about 1463.9730188771. The cubic root of 2143217 is about 128.9304153692.

Adding to 2143217 its reverse (7123412), we get a palindrome (9266629).

The spelling of 2143217 in words is "two million, one hundred forty-three thousand, two hundred seventeen".