212031222 has 64 divisors (see below), whose sum is σ = 484081920. Its totient is φ = 61375104.

The previous prime is 212031173. The next prime is 212031251. The reversal of 212031222 is 222130212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255973 + ... + 256799.

It is an arithmetic number, because the mean of its divisors is an integer number (7563780).

Almost surely, 2^212031222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212031222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242040960).

212031222 is an abundant number, since it is smaller than the sum of its proper divisors (272050698).

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

212031222 is a wasteful number, since it uses less digits than its factorization.

212031222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037.

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

The square root of 212031222 is about 14561.2919069703. The cubic root of 212031222 is about 596.3024661012.

Adding to 212031222 its reverse (222130212), we get a palindrome (434161434).

The spelling of 212031222 in words is "two hundred twelve million, thirty-one thousand, two hundred twenty-two".