212222450 has 24 divisors (see below), whose sum is σ = 430619760. Its totient is φ = 77171600.

The previous prime is 212222447. The next prime is 212222471. The reversal of 212222450 is 54222212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192380 + ... + 193479.

It is an arithmetic number, because the mean of its divisors is an integer number (17942490).

Almost surely, 2^212222450 is an apocalyptic number.

212222450 is an abundant number, since it is smaller than the sum of its proper divisors (218397310).

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

212222450 is a wasteful number, since it uses less digits than its factorization.

212222450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385882 (or 385877 counting only the distinct ones).

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

The square root of 212222450 is about 14567.8567400974. The cubic root of 212222450 is about 596.4816778599.

Adding to 212222450 its reverse (54222212), we get a palindrome (266444662).

The spelling of 212222450 in words is "two hundred twelve million, two hundred twenty-two thousand, four hundred fifty".