313217 has 4 divisors (see below), whose sum is σ = 314580. Its totient is φ = 311856.

The previous prime is 313211. The next prime is 313219. The reversal of 313217 is 712313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 234256 + 78961 = 484^2 + 281^2 .

It is a cyclic number.

It is not a de Polignac number, because 313217 - 2⁶ = 313153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313195 and 313204.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 313217.

It is not an unprimeable number, because it can be changed into a prime (313211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242 + ... + 827.

It is an arithmetic number, because the mean of its divisors is an integer number (78645).

2³¹³²¹⁷ is an apocalyptic number.

It is an amenable number.

313217 is a deficient number, since it is larger than the sum of its proper divisors (1363).

313217 is a wasteful number, since it uses less digits than its factorization.

313217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362.

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

The square root of 313217 is about 559.6579312401. The cubic root of 313217 is about 67.9123004374.

The spelling of 313217 in words is "three hundred thirteen thousand, two hundred seventeen".