320320313220 has 48 divisors (see below), whose sum is σ = 935892397440. Its totient is φ = 81704891136.

The previous prime is 320320313219. The next prime is 320320313221. The reversal of 320320313220 is 22313023023.

It is an interprime number because it is at equal distance from previous prime (320320313219) and next prime (320320313221).

It is a super-2 number, since 2×320320313220² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320320313221) 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, 116056705 + ... + 116059464.

It is an arithmetic number, because the mean of its divisors is an integer number (19497758280).

Almost surely, 2^320320313220 is an apocalyptic number.

320320313220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320320313220 is an abundant number, since it is smaller than the sum of its proper divisors (615572084220).

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

320320313220 is a wasteful number, since it uses less digits than its factorization.

320320313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232116204 (or 232116202 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 320320313220 its reverse (22313023023), we get a palindrome (342633336243).

The spelling of 320320313220 in words is "three hundred twenty billion, three hundred twenty million, three hundred thirteen thousand, two hundred twenty".