131231443424 has 96 divisors (see below), whose sum is σ = 277590843936. Its totient is φ = 60849930240.

The previous prime is 131231443397. The next prime is 131231443429. The reversal of 131231443424 is 424344132131.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131231443429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17921684 + ... + 17929004.

It is an arithmetic number, because the mean of its divisors is an integer number (2891571291).

Almost surely, 2^131231443424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131231443424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138795421968).

131231443424 is an abundant number, since it is smaller than the sum of its proper divisors (146359400512).

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

131231443424 is a wasteful number, since it uses less digits than its factorization.

131231443424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7828 (or 7820 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

Adding to 131231443424 its reverse (424344132131), we get a palindrome (555575575555).

The spelling of 131231443424 in words is "one hundred thirty-one billion, two hundred thirty-one million, four hundred forty-three thousand, four hundred twenty-four".