2031231312 has 60 divisors (see below), whose sum is σ = 6201415584. Its totient is φ = 615524160.

The previous prime is 2031231287. The next prime is 2031231317. The reversal of 2031231312 is 2131321302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031231317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 639588 + ... + 642755.

Almost surely, 2^2031231312 is an apocalyptic number.

2031231312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2031231312 is an abundant number, since it is smaller than the sum of its proper divisors (4170184272).

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

2031231312 is a wasteful number, since it uses less digits than its factorization.

2031231312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282368 (or 1282359 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2031231312 is about 45069.1836180777. The cubic root of 2031231312 is about 1266.4453708817.

Adding to 2031231312 its reverse (2131321302), we get a palindrome (4162552614).

The spelling of 2031231312 in words is "two billion, thirty-one million, two hundred thirty-one thousand, three hundred twelve".