131543568 has 160 divisors (see below), whose sum is σ = 414556800. Its totient is φ = 39688704.

The previous prime is 131543567. The next prime is 131543641. The reversal of 131543568 is 865345131.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (131543561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 331146 + ... + 331542.

It is an arithmetic number, because the mean of its divisors is an integer number (2590980).

Almost surely, 2^131543568 is an apocalyptic number.

131543568 is a gapful number since it is divisible by the number (18) 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 131543568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207278400).

131543568 is an abundant number, since it is smaller than the sum of its proper divisors (283013232).

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

131543568 is a wasteful number, since it uses less digits than its factorization.

131543568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 474 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 131543568 is about 11469.2444389332. The cubic root of 131543568 is about 508.5767933377.

Adding to 131543568 its reverse (865345131), we get a palindrome (996888699).

The spelling of 131543568 in words is "one hundred thirty-one million, five hundred forty-three thousand, five hundred sixty-eight".