212213220 has 48 divisors (see below), whose sum is σ = 596852928. Its totient is φ = 56337280.

The previous prime is 212213189. The next prime is 212213231. The reversal of 212213220 is 22312212.

It is a happy number.

212213220 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 (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212213220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5830 + ... + 21410.

It is an arithmetic number, because the mean of its divisors is an integer number (12434436).

Almost surely, 2^212213220 is an apocalyptic number.

212213220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212213220 is an abundant number, since it is smaller than the sum of its proper divisors (384639708).

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

212213220 is a wasteful number, since it uses less digits than its factorization.

212213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15820 (or 15818 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 212213220 is about 14567.5399433123. The cubic root of 212213220 is about 596.4730303209.

Adding to 212213220 its reverse (22312212), we get a palindrome (234525432).

The spelling of 212213220 in words is "two hundred twelve million, two hundred thirteen thousand, two hundred twenty".