331217 has 2 divisors, whose sum is σ = 331218. Its totient is φ = 331216.

The previous prime is 331213. The next prime is 331231. The reversal of 331217 is 712133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231361 + 99856 = 481^2 + 316^2 .

It is an emirp because it is prime and its reverse (712133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331217 - 2² = 331213 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 331195 and 331204.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331217.

It is not a weakly prime, because it can be changed into another prime (331213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165608 + 165609.

It is an arithmetic number, because the mean of its divisors is an integer number (165609).

2³³¹²¹⁷ is an apocalyptic number.

It is an amenable number.

331217 is a deficient number, since it is larger than the sum of its proper divisors (1).

331217 is an equidigital number, since it uses as much as digits as its factorization.

331217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126, while the sum is 17.

The square root of 331217 is about 575.5145523790. The cubic root of 331217 is about 69.1890774301.

The spelling of 331217 in words is "three hundred thirty-one thousand, two hundred seventeen".