216475212 has 48 divisors (see below), whose sum is σ = 537032160. Its totient is φ = 67633152.

The previous prime is 216475177. The next prime is 216475213. The reversal of 216475212 is 212574612.

216475212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 216475212.

It is not an unprimeable number, because it can be changed into a prime (216475213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50364 + ... + 54492.

It is an arithmetic number, because the mean of its divisors is an integer number (11188170).

Almost surely, 2^216475212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216475212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268516080).

216475212 is an abundant number, since it is smaller than the sum of its proper divisors (320556948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216475212 is a wasteful number, since it uses less digits than its factorization.

216475212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4410 (or 4408 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 216475212 is about 14713.0966149210. The cubic root of 216475212 is about 600.4396888220.

The spelling of 216475212 in words is "two hundred sixteen million, four hundred seventy-five thousand, two hundred twelve".