2331313220 has 24 divisors (see below), whose sum is σ = 4899844824. Its totient is φ = 931746816.

The previous prime is 2331313183. The next prime is 2331313247. The reversal of 2331313220 is 223131332.

It can be written as a sum of positive squares in 4 ways, for example, as 180579844 + 2150733376 = 13438^2 + 46376^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2331313192 and 2331313201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23789 + ... + 72308.

It is an arithmetic number, because the mean of its divisors is an integer number (204160201).

Almost surely, 2^2331313220 is an apocalyptic number.

2331313220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2331313220 is an abundant number, since it is smaller than the sum of its proper divisors (2568531604).

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

2331313220 is a wasteful number, since it uses less digits than its factorization.

2331313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97319 (or 97317 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 2331313220 is about 48283.6744666352. The cubic root of 2331313220 is about 1325.9695232347.

Adding to 2331313220 its reverse (223131332), we get a palindrome (2554444552).

The spelling of 2331313220 in words is "two billion, three hundred thirty-one million, three hundred thirteen thousand, two hundred twenty".