212405222 has 24 divisors (see below), whose sum is σ = 333817200. Its totient is φ = 101242400.

The previous prime is 212405213. The next prime is 212405231. The reversal of 212405222 is 222504212.

212405222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212405213) and next prime (212405231).

It is a junction number, because it is equal to n+sod(n) for n = 212405194 and 212405203.

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, 591479 + ... + 591837.

It is an arithmetic number, because the mean of its divisors is an integer number (13909050).

Almost surely, 2^212405222 is an apocalyptic number.

212405222 is a deficient number, since it is larger than the sum of its proper divisors (121411978).

212405222 is a wasteful number, since it uses less digits than its factorization.

212405222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 212405222 is about 14574.1285159697. The cubic root of 212405222 is about 596.6528643784.

Adding to 212405222 its reverse (222504212), we get a palindrome (434909434).

It can be divided in two parts, 21240 and 5222, that added together give a palindrome (26462).

The spelling of 212405222 in words is "two hundred twelve million, four hundred five thousand, two hundred twenty-two".