323213220 has 96 divisors (see below), whose sum is σ = 1096986240. Its totient is φ = 78353280.

The previous prime is 323213203. The next prime is 323213221. The reversal of 323213220 is 22312323.

It is a happy number.

323213220 is a `hidden beast` number, since 323 + 21 + 322 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 323213193 and 323213202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323213221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21267 + ... + 33146.

It is an arithmetic number, because the mean of its divisors is an integer number (11426940).

Almost surely, 2^323213220 is an apocalyptic number.

323213220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

323213220 is an abundant number, since it is smaller than the sum of its proper divisors (773773020).

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

323213220 is a wasteful number, since it uses less digits than its factorization.

323213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54442 (or 54434 counting only the distinct ones).

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

The square root of 323213220 is about 17978.1317160599. The cubic root of 323213220 is about 686.2721453632.

Adding to 323213220 its reverse (22312323), we get a palindrome (345525543).

The spelling of 323213220 in words is "three hundred twenty-three million, two hundred thirteen thousand, two hundred twenty".