2031981312 has 36 divisors (see below), whose sum is σ = 5408035640. Its totient is φ = 677326848.

The previous prime is 2031981311. The next prime is 2031981319. The reversal of 2031981312 is 2131891302.

It is a self number, because there is not a number n which added to its sum of digits gives 2031981312.

It is not an unprimeable number, because it can be changed into a prime (2031981311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1322137 + ... + 1323672.

Almost surely, 2^2031981312 is an apocalyptic number.

It is an amenable number.

2031981312 is an abundant number, since it is smaller than the sum of its proper divisors (3376054328).

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

2031981312 is an equidigital number, since it uses as much as digits as its factorization.

2031981312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645828 (or 2645814 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 2031981312 is about 45077.5033913814. The cubic root of 2031981312 is about 1266.6012233348.

The spelling of 2031981312 in words is "two billion, thirty-one million, nine hundred eighty-one thousand, three hundred twelve".