2031313320 has 96 divisors (see below), whose sum is σ = 6780238920. Its totient is φ = 527040000.

The previous prime is 2031313261. The next prime is 2031313321. The reversal of 2031313320 is 233131302.

2031313320 is a `hidden beast` number, since 2 + 0 + 31 + 313 + 320 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1683789156 + 347524164 = 41034^2 + 18642^2 .

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 = 2031313293 and 2031313302.

It is not an unprimeable number, because it can be changed into a prime (2031313321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62931 + ... + 89570.

Almost surely, 2^2031313320 is an apocalyptic number.

2031313320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031313320 is an abundant number, since it is smaller than the sum of its proper divisors (4748925600).

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

2031313320 is a wasteful number, since it uses less digits than its factorization.

2031313320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152555 (or 152548 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 2031313320 is about 45070.0934101539. The cubic root of 2031313320 is about 1266.4624142802.

Adding to 2031313320 its reverse (233131302), we get a palindrome (2264444622).

It can be divided in two parts, 20313 and 13320, that added together give a palindrome (33633).

The spelling of 2031313320 in words is "two billion, thirty-one million, three hundred thirteen thousand, three hundred twenty".