The value of Rydberg constant $(R_H)$ is $2.18 \times 10^{-18} \mathrm{~J}$. The velocity of electron having mass $9.1 \times 10^{-31} \mathrm{~kg}$ in Bohr's first orbit of hydrogen atom = ________ $\times 10^5 \mathrm{~ms}^{-1}$ (nearest integer).