218801212 has 24 divisors (see below), whose sum is σ = 439175520. Its totient is φ = 93434880.

The previous prime is 218801189. The next prime is 218801227. The reversal of 218801212 is 212108812.

218801212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6037 + ... + 21772.

It is an arithmetic number, because the mean of its divisors is an integer number (18298980).

Almost surely, 2^218801212 is an apocalyptic number.

It is an amenable number.

218801212 is an abundant number, since it is smaller than the sum of its proper divisors (220374308).

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

218801212 is a wasteful number, since it uses less digits than its factorization.

218801212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28101 (or 28099 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 218801212 is about 14791.9306380202. The cubic root of 218801212 is about 602.5825826438.

The spelling of 218801212 in words is "two hundred eighteen million, eight hundred one thousand, two hundred twelve".