131031302020 has 24 divisors (see below), whose sum is σ = 275693905368. Its totient is φ = 52311916800.

The previous prime is 131031302009. The next prime is 131031302027. The reversal of 131031302020 is 20203130131.

It can be written as a sum of positive squares in 4 ways, for example, as 622203136 + 130409098884 = 24944^2 + 361122^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131031301985 and 131031302003.

It is not an unprimeable number, because it can be changed into a prime (131031302027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6277071 + ... + 6297910.

It is an arithmetic number, because the mean of its divisors is an integer number (11487246057).

Almost surely, 2^131031302020 is an apocalyptic number.

131031302020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131031302020 is an abundant number, since it is smaller than the sum of its proper divisors (144662603348).

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

131031302020 is a wasteful number, since it uses less digits than its factorization.

131031302020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12575511 (or 12575509 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 131031302020 its reverse (20203130131), we get a palindrome (151234432151).

The spelling of 131031302020 in words is "one hundred thirty-one billion, thirty-one million, three hundred two thousand, twenty".