216315106 has 24 divisors (see below), whose sum is σ = 399653676. Its totient is φ = 87252480.

The previous prime is 216315097. The next prime is 216315107. The reversal of 216315106 is 601513612.

216315106 is digitally balanced in base 2 and base 3, because in such bases 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 203319081 + 12996025 = 14259^2 + 3605^2 .

It is not an unprimeable number, because it can be changed into a prime (216315107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63255 + ... + 66586.

Almost surely, 2^216315106 is an apocalyptic number.

216315106 is a deficient number, since it is larger than the sum of its proper divisors (183338570).

216315106 is a wasteful number, since it uses less digits than its factorization.

216315106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129874 (or 129867 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 216315106 is about 14707.6546736725. The cubic root of 216315106 is about 600.2916230518.

Adding to 216315106 its reverse (601513612), we get a palindrome (817828718).

The spelling of 216315106 in words is "two hundred sixteen million, three hundred fifteen thousand, one hundred six".