320331212220 has 48 divisors (see below), whose sum is σ = 912129563520. Its totient is φ = 83973830976.

The previous prime is 320331212197. The next prime is 320331212221. The reversal of 320331212220 is 22212133023.

It is a happy number.

It is a super-2 number, since 2×320331212220² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320331212221) 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, 45240982 + ... + 45248061.

It is an arithmetic number, because the mean of its divisors is an integer number (19002699240).

Almost surely, 2^320331212220 is an apocalyptic number.

320331212220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320331212220 is an abundant number, since it is smaller than the sum of its proper divisors (591798351300).

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

320331212220 is a wasteful number, since it uses less digits than its factorization.

320331212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90489114 (or 90489112 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 320331212220 its reverse (22212133023), we get a palindrome (342543345243).

It can be divided in two parts, 32033 and 1212220, that added together give a triangular number (1244253 = T₁₅₇₇).

The spelling of 320331212220 in words is "three hundred twenty billion, three hundred thirty-one million, two hundred twelve thousand, two hundred twenty".