216455228 has 12 divisors (see below), whose sum is σ = 413232792. Its totient is φ = 98388720.

The previous prime is 216455227. The next prime is 216455243. The reversal of 216455228 is 822554612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216455227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2459675 + ... + 2459762.

It is an arithmetic number, because the mean of its divisors is an integer number (34436066).

Almost surely, 2^216455228 is an apocalyptic number.

It is an amenable number.

216455228 is a deficient number, since it is larger than the sum of its proper divisors (196777564).

216455228 is a wasteful number, since it uses less digits than its factorization.

216455228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4919452 (or 4919450 counting only the distinct ones).

The product of its digits is 38400, while the sum is 35.

The square root of 216455228 is about 14712.4174764041. The cubic root of 216455228 is about 600.4212116395.

The spelling of 216455228 in words is "two hundred sixteen million, four hundred fifty-five thousand, two hundred twenty-eight".