317220 has 48 divisors (see below), whose sum is σ = 943488. Its totient is φ = 79360.

The previous prime is 317209. The next prime is 317227. The reversal of 317220 is 22713.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 317220.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 317220.

It is not an unprimeable number, because it can be changed into a prime (317227) by changing a digit.

317220 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 865 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (19656).

2³¹⁷²²⁰ is an apocalyptic number.

317220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 317220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (471744).

317220 is an abundant number, since it is smaller than the sum of its proper divisors (626268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

317220 is a wasteful number, since it uses less digits than its factorization.

317220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 317220 is about 563.2228688539. Note that the first 3 decimals coincide. The cubic root of 317220 is about 68.2003892846.

Adding to 317220 its reverse (22713), we get a palindrome (339933).

The spelling of 317220 in words is "three hundred seventeen thousand, two hundred twenty", and thus it is an iban number.