320133220 has 24 divisors (see below), whose sum is σ = 733396608. Its totient is φ = 116412000.

The previous prime is 320133217. The next prime is 320133227. The reversal of 320133220 is 22331023.

It is a junction number, because it is equal to n+sod(n) for n = 320133194 and 320133203.

It is not an unprimeable number, because it can be changed into a prime (320133227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727356 + ... + 727795.

It is an arithmetic number, because the mean of its divisors is an integer number (30558192).

Almost surely, 2^320133220 is an apocalyptic number.

It is an amenable number.

320133220 is an abundant number, since it is smaller than the sum of its proper divisors (413263388).

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

320133220 is a wasteful number, since it uses less digits than its factorization.

320133220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455171 (or 1455169 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 320133220 is about 17892.2670447319. The cubic root of 320133220 is about 684.0852834167.

Adding to 320133220 its reverse (22331023), we get a palindrome (342464243).

The spelling of 320133220 in words is "three hundred twenty million, one hundred thirty-three thousand, two hundred twenty".