323211220 has 48 divisors (see below), whose sum is σ = 697656960. Its totient is φ = 125709696.

The previous prime is 323211209. The next prime is 323211221. The reversal of 323211220 is 22112323.

It is a junction number, because it is equal to n+sod(n) for n = 323211194 and 323211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323211221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225466 + ... + 226894.

It is an arithmetic number, because the mean of its divisors is an integer number (14534520).

Almost surely, 2^323211220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 323211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (348828480).

323211220 is an abundant number, since it is smaller than the sum of its proper divisors (374445740).

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

323211220 is a wasteful number, since it uses less digits than its factorization.

323211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744 (or 1742 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 323211220 is about 17978.0760928415. The cubic root of 323211220 is about 686.2707298403.

Adding to 323211220 its reverse (22112323), we get a palindrome (345323543).

The spelling of 323211220 in words is "three hundred twenty-three million, two hundred eleven thousand, two hundred twenty".