Adding to 216334374 its reverse (473433612), we get a palindrome (689767986).
It is a congruent number.
It is an unprimeable number.
Almost surely, 2216334374 is an apocalyptic number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
216334374 is a wasteful number, since it uses less digits than its factorization.
216334374 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3964.
The square root of 216334374 is about 14708.3096921434. The cubic root of 216334374 is about 600.3094459335.
The spelling of 216334374 in words is "two hundred sixteen million, three hundred thirty-four thousand, three hundred seventy-four".