'Fifty' in the Bible

Then Adonijah the son of Haggith exalted himself, saying, I will be king: and he prepared him chariots and horsemen, and fifty men to run before him.

He built also the house of the forest of Lebanon; the length thereof was an hundred cubits, and the breadth thereof fifty cubits, and the height thereof thirty cubits, upon four rows of cedar pillars, with cedar beams upon the pillars.

And he made a porch of pillars; the length thereof was fifty cubits, and the breadth thereof thirty cubits: and the porch was before them: and the other pillars and the thick beam were before them.

These were the chief of the officers that were over Solomon's work, five hundred and fifty, which bare rule over the people that wrought in the work.

And a chariot came up and went out of Egypt for six hundred shekels of silver, and an horse for an hundred and fifty: and so for all the kings of the Hittites, and for the kings of Syria, did they bring them out by their means.

For it was so, when Jezebel cut off the prophets of the LORD, that Obadiah took an hundred prophets, and hid them by fifty in a cave, and fed them with bread and water.)

Was it not told my lord what I did when Jezebel slew the prophets of the LORD, how I hid an hundred men of the LORD'S prophets by fifty in a cave, and fed them with bread and water?

Now therefore send, and gather to me all Israel unto mount Carmel, and the prophets of Baal four hundred and fifty, and the prophets of the groves four hundred, which eat at Jezebel's table.

Then said Elijah unto the people, I, even I only, remain a prophet of the LORD; but Baal's prophets are four hundred and fifty men.