When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

There are two arch enemies Messi and Ronaldo who hate each other to an extreme. One day both were going together and a Jeanie appeared in front of them. Jeanie grants 3 wishes to Ronaldo and one to Messi.

Messi replied smartly 'Give me twice whatever Ronaldo demands'.

Ronaldo asked his 1st wish 'Give me 10000 billion dollars. Soon Messi gets 2000 billion dollars.
Ronaldo asked for his 2nd wish 'Give me one mansion in every country in the world. Soon Messi gets two mansions in every country of the world?

What should be Ronaldo's third wish?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

What has one letter and starts with an E?

Count the number of triangles in the given picture.

Imagine you are in a room with no windows or doors. How will you get out?

what does the below rebus means?

In the picture given below, can you find out which digit will take place of the question mark?