131543520 has 96 divisors (see below), whose sum is σ = 416949120. Its totient is φ = 34859520.

The previous prime is 131543483. The next prime is 131543527. The reversal of 131543520 is 25345131.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131543527) 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, 85155 + ... + 86685.

It is an arithmetic number, because the mean of its divisors is an integer number (4343220).

Almost surely, 2^131543520 is an apocalyptic number.

131543520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131543520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208474560).

131543520 is an abundant number, since it is smaller than the sum of its proper divisors (285405600).

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

131543520 is a wasteful number, since it uses less digits than its factorization.

131543520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728 (or 1720 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 131543520 is about 11469.2423463802. The cubic root of 131543520 is about 508.5767314781.

Adding to 131543520 its reverse (25345131), we get a palindrome (156888651).

The spelling of 131543520 in words is "one hundred thirty-one million, five hundred forty-three thousand, five hundred twenty".