212304222 has 72 divisors (see below), whose sum is σ = 503758008. Its totient is φ = 64584000.

The previous prime is 212304199. The next prime is 212304229. The reversal of 212304222 is 222403212.

212304222 is a `hidden beast` number, since 212 + 30 + 422 + 2 = 666.

212304222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212304195 and 212304204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212304229) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 306897 + ... + 307587.

It is an arithmetic number, because the mean of its divisors is an integer number (6996639).

Almost surely, 2^212304222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212304222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251879004).

212304222 is an abundant number, since it is smaller than the sum of its proper divisors (291453786).

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

212304222 is a wasteful number, since it uses less digits than its factorization.

212304222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 212304222 is about 14570.6630597238. The cubic root of 212304222 is about 596.5582786727.

Adding to 212304222 its reverse (222403212), we get a palindrome (434707434).

It can be divided in two parts, 21230 and 4222, that added together give a palindrome (25452).

The spelling of 212304222 in words is "two hundred twelve million, three hundred four thousand, two hundred twenty-two".