216228706 has 8 divisors (see below), whose sum is σ = 324431964. Its totient is φ = 108084720.

The previous prime is 216228673. The next prime is 216228737. The reversal of 216228706 is 607822612.

216228706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 215825481 + 403225 = 14691^2 + 635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4165 + ... + 21208.

Almost surely, 2^216228706 is an apocalyptic number.

216228706 is a deficient number, since it is larger than the sum of its proper divisors (108203258).

216228706 is a wasteful number, since it uses less digits than its factorization.

216228706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29636.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 216228706 is about 14704.7171343076. The cubic root of 216228706 is about 600.2116901182.

The spelling of 216228706 in words is "two hundred sixteen million, two hundred twenty-eight thousand, seven hundred six".