212223330 has 96 divisors (see below), whose sum is σ = 614884608. Its totient is φ = 50342400.

The previous prime is 212223313. The next prime is 212223343. The reversal of 212223330 is 33322212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44250 + ... + 48810.

It is an arithmetic number, because the mean of its divisors is an integer number (6405048).

Almost surely, 2^212223330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212223330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307442304).

212223330 is an abundant number, since it is smaller than the sum of its proper divisors (402661278).

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

212223330 is a wasteful number, since it uses less digits than its factorization.

212223330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4632 (or 4629 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 212223330 is about 14567.8869435481. The cubic root of 212223330 is about 596.4825023142.

Adding to 212223330 its reverse (33322212), we get a palindrome (245545542).

It can be divided in two parts, 2122 and 23330, that added together give a palindrome (25452).

The spelling of 212223330 in words is "two hundred twelve million, two hundred twenty-three thousand, three hundred thirty".