using System;

using System.Linq;

using System.Numerics;

public class Program

{

    public static void Main()

    {

        long sum = 0;

        for(int i = 100000;i <= 999999;i++)

        {

            if(!IsPrime(i)) continue;

            var currSum = i;

            var stepsUntilPalindrome = GetStepsUntilPalindrome(i);

            if(stepsUntilPalindrome == 64)

            {

                sum+= i;

            }

        }

        Console.WriteLine(sum);

    }

    public static int GetStepsUntilPalindrome(int n)

    {

        int count = 0;

        BigInteger current = n;

        while(!IsPalindrome(current) && count < 65)

        {

            current = current + GetReverseNumber(current);

            count++;

        }

        return count;

    }

    public static bool IsPalindrome(BigInteger n)

    {

        return  GetReverseNumber(n) == n;

    }

    public static BigInteger GetReverseNumber(BigInteger n)

    {

        return BigInteger.Parse(new string(n.ToString().Reverse().ToArray()));

    }

    public static bool IsPrime(int n)

    {

        for (int i = 2; i <= Math.Sqrt(n); i++)

        {

            if (n % i == 0)

            {

                return false;

            }

        }

        return true;

    }

}