212340222 has 24 divisors (see below), whose sum is σ = 460582200. Its totient is φ = 70701360.

The previous prime is 212340187. The next prime is 212340241. The reversal of 212340222 is 222043212.

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 = 212340195 and 212340204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11404 + ... + 23552.

It is an arithmetic number, because the mean of its divisors is an integer number (19190925).

Almost surely, 2^212340222 is an apocalyptic number.

212340222 is an abundant number, since it is smaller than the sum of its proper divisors (248241978).

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

212340222 is a wasteful number, since it uses less digits than its factorization.

212340222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13128 (or 13125 counting only the distinct ones).

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

The square root of 212340222 is about 14571.8983663763. The cubic root of 212340222 is about 596.5919958295.

Adding to 212340222 its reverse (222043212), we get a palindrome (434383434).

The spelling of 212340222 in words is "two hundred twelve million, three hundred forty thousand, two hundred twenty-two".