2031217 has 2 divisors, whose sum is σ = 2031218. Its totient is φ = 2031216.

The previous prime is 2031187. The next prime is 2031223. The reversal of 2031217 is 7121302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1062961 + 968256 = 1031^2 + 984^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031217 - 2¹⁵ = 1998449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2031217.

It is not a weakly prime, because it can be changed into another prime (2031257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015608 + 1015609.

It is an arithmetic number, because the mean of its divisors is an integer number (1015609).

2^2031217 is an apocalyptic number.

It is an amenable number.

2031217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031217 is an equidigital number, since it uses as much as digits as its factorization.

2031217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 2031217 is about 1425.2077041610. The cubic root of 2031217 is about 126.6442396428.

Adding to 2031217 its reverse (7121302), we get a palindrome (9152519).

The spelling of 2031217 in words is "two million, thirty-one thousand, two hundred seventeen".