212233220 has 48 divisors (see below), whose sum is σ = 463494528. Its totient is φ = 81565440.

The previous prime is 212233193. The next prime is 212233237. The reversal of 212233220 is 22332212.

212233220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53009 + ... + 56871.

It is an arithmetic number, because the mean of its divisors is an integer number (9656136).

Almost surely, 2^212233220 is an apocalyptic number.

212233220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212233220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231747264).

212233220 is an abundant number, since it is smaller than the sum of its proper divisors (251261308).

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

212233220 is a wasteful number, since it uses less digits than its factorization.

212233220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3980 (or 3978 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 212233220 is about 14568.2263848418. The cubic root of 212233220 is about 596.4917678998.

Adding to 212233220 its reverse (22332212), we get a palindrome (234565432).

The spelling of 212233220 in words is "two hundred twelve million, two hundred thirty-three thousand, two hundred twenty".