320217217 has 8 divisors (see below), whose sum is σ = 333115200. Its totient is φ = 307443024.

The previous prime is 320217211. The next prime is 320217221. The reversal of 320217217 is 712712023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320217217 - 2¹⁹ = 319692929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320217191 and 320217200.

It is not an unprimeable number, because it can be changed into a prime (320217211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25653 + ... + 36034.

It is an arithmetic number, because the mean of its divisors is an integer number (41639400).

Almost surely, 2^320217217 is an apocalyptic number.

It is an amenable number.

320217217 is a deficient number, since it is larger than the sum of its proper divisors (12897983).

320217217 is a wasteful number, since it uses less digits than its factorization.

320217217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61895.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 320217217 is about 17894.6141897499. The cubic root of 320217217 is about 684.1451086011.

The spelling of 320217217 in words is "three hundred twenty million, two hundred seventeen thousand, two hundred seventeen".