216222250 has 32 divisors (see below), whose sum is σ = 406785600. Its totient is φ = 86058000.

The previous prime is 216222229. The next prime is 216222257. The reversal of 216222250 is 52222612.

It is a happy number.

It is a super-2 number, since 2×216222250² = 93504122790125000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216222257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50701 + ... + 54799.

It is an arithmetic number, because the mean of its divisors is an integer number (12712050).

Almost surely, 2^216222250 is an apocalyptic number.

216222250 is a deficient number, since it is larger than the sum of its proper divisors (190563350).

216222250 is a wasteful number, since it uses less digits than its factorization.

216222250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4327 (or 4317 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 216222250 is about 14704.4976112753. The cubic root of 216222250 is about 600.2057164968.

Adding to 216222250 its reverse (52222612), we get a palindrome (268444862).

The spelling of 216222250 in words is "two hundred sixteen million, two hundred twenty-two thousand, two hundred fifty".