131343431020 has 24 divisors (see below), whose sum is σ = 283275833904. Its totient is φ = 51117443136.

The previous prime is 131343431017. The next prime is 131343431027. The reversal of 131343431020 is 20134343131.

It is not an unprimeable number, because it can be changed into a prime (131343431027) 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, 88744822 + ... + 88746301.

It is an arithmetic number, because the mean of its divisors is an integer number (11803159746).

Almost surely, 2^131343431020 is an apocalyptic number.

131343431020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131343431020 is an abundant number, since it is smaller than the sum of its proper divisors (151932402884).

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

131343431020 is a wasteful number, since it uses less digits than its factorization.

131343431020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177491169 (or 177491167 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 131343431020 its reverse (20134343131), we get a palindrome (151477774151).

The spelling of 131343431020 in words is "one hundred thirty-one billion, three hundred forty-three million, four hundred thirty-one thousand, twenty".