## Problem:

215 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.

What is the sum of the digits of the number 21000?

1366

## Code:The solution may include methods that will be found here: Library.java .

public interface EulerSolution{

public String run();

}
/*
* Solution to Project Euler problem 16
* By Nayuki Minase
*
* http://nayuki.eigenstate.org/page/project-euler-solutions
* https://github.com/nayuki/Project-Euler-solutions
*/

import java.math.BigInteger;

public final class p016 implements EulerSolution {

public static void main(String[] args) {
System.out.println(new p016().run());
}

public String run() {
String temp = BigInteger.ONE.shiftLeft(1000).toString();
int sum = 0;
for (int i = 0; i < temp.length(); i++)
sum += temp.charAt(i) - '0';
return Integer.toString(sum);
}

}

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