131031310020 has 96 divisors (see below), whose sum is σ = 397726775040. Its totient is φ = 32040230400.

The previous prime is 131031310013. The next prime is 131031310021. The reversal of 131031310020 is 20013130131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (131031310021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 438475 + ... + 674034.

It is an arithmetic number, because the mean of its divisors is an integer number (4142987240).

Almost surely, 2^131031310020 is an apocalyptic number.

131031310020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131031310020 is an abundant number, since it is smaller than the sum of its proper divisors (266695465020).

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

131031310020 is a wasteful number, since it uses less digits than its factorization.

131031310020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112685 (or 1112683 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 131031310020 its reverse (20013130131), we get a palindrome (151044440151).

The spelling of 131031310020 in words is "one hundred thirty-one billion, thirty-one million, three hundred ten thousand, twenty".