131231009982 has 16 divisors (see below), whose sum is σ = 262471681152. Its totient is φ = 43742059800.

The previous prime is 131231009971. The next prime is 131231009983. The reversal of 131231009982 is 289900132131.

It is a self number, because there is not a number n which added to its sum of digits gives 131231009982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131231009983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219568 + ... + 557379.

It is an arithmetic number, because the mean of its divisors is an integer number (16404480072).

Almost surely, 2^131231009982 is an apocalyptic number.

131231009982 is an abundant number, since it is smaller than the sum of its proper divisors (131240671170).

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

131231009982 is a wasteful number, since it uses less digits than its factorization.

131231009982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805103.

The product of its (nonzero) digits is 23328, while the sum is 39.

The spelling of 131231009982 in words is "one hundred thirty-one billion, two hundred thirty-one million, nine thousand, nine hundred eighty-two".