212223432366 has 144 divisors (see below), whose sum is σ = 514110654720. Its totient is φ = 62746601760.

The previous prime is 212223432359. The next prime is 212223432367. The reversal of 212223432366 is 663234322212.

212223432366 is a `hidden beast` number, since 21 + 22 + 234 + 323 + 66 = 666.

212223432366 is digitally balanced in base 3, 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 212223432366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212223432367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 204256875 + ... + 204257913.

It is an arithmetic number, because the mean of its divisors is an integer number (3570212880).

Almost surely, 2^212223432366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212223432366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257055327360).

212223432366 is an abundant number, since it is smaller than the sum of its proper divisors (301887222354).

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

212223432366 is a wasteful number, since it uses less digits than its factorization.

212223432366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619 (or 1569 counting only the distinct ones).

The product of its digits is 124416, while the sum is 36.

Adding to 212223432366 its reverse (663234322212), we get a palindrome (875457754578).

The spelling of 212223432366 in words is "two hundred twelve billion, two hundred twenty-three million, four hundred thirty-two thousand, three hundred sixty-six".