212330220 has 48 divisors (see below), whose sum is σ = 596345568. Its totient is φ = 56448000.

The previous prime is 212330213. The next prime is 212330269. The reversal of 212330220 is 22033212.

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 212330220.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14970 + ... + 25470.

It is an arithmetic number, because the mean of its divisors is an integer number (12423866).

Almost surely, 2^212330220 is an apocalyptic number.

212330220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212330220 is an abundant number, since it is smaller than the sum of its proper divisors (384015348).

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

212330220 is a wasteful number, since it uses less digits than its factorization.

212330220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10850 (or 10848 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 212330220 is about 14571.5551675173. Note that the first 3 decimals coincide. The cubic root of 212330220 is about 596.5826284618.

Adding to 212330220 its reverse (22033212), we get a palindrome (234363432).

The spelling of 212330220 in words is "two hundred twelve million, three hundred thirty thousand, two hundred twenty".