218229132 has 24 divisors (see below), whose sum is σ = 555492672. Its totient is φ = 66130000.

The previous prime is 218229107. The next prime is 218229133. The reversal of 218229132 is 231922812.

218229132 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 218229132.

It is not an unprimeable number, because it can be changed into a prime (218229133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 826494 + ... + 826757.

It is an arithmetic number, because the mean of its divisors is an integer number (23145528).

Almost surely, 2^218229132 is an apocalyptic number.

218229132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

218229132 is an abundant number, since it is smaller than the sum of its proper divisors (337263540).

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

218229132 is a wasteful number, since it uses less digits than its factorization.

218229132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653269 (or 1653267 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 218229132 is about 14772.5804110182. The cubic root of 218229132 is about 602.0569513049.

The spelling of 218229132 in words is "two hundred eighteen million, two hundred twenty-nine thousand, one hundred thirty-two".