131591568 has 40 divisors (see below), whose sum is σ = 357839200. Its totient is φ = 41554944.

The previous prime is 131591563. The next prime is 131591569. The reversal of 131591568 is 865195131.

It is not an unprimeable number, because it can be changed into a prime (131591563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71233 + ... + 73056.

It is an arithmetic number, because the mean of its divisors is an integer number (8945980).

Almost surely, 2^131591568 is an apocalyptic number.

It is an amenable number.

131591568 is an abundant number, since it is smaller than the sum of its proper divisors (226247632).

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

131591568 is a wasteful number, since it uses less digits than its factorization.

131591568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144319 (or 144313 counting only the distinct ones).

The product of its digits is 32400, while the sum is 39.

The square root of 131591568 is about 11471.3368009138. The cubic root of 131591568 is about 508.6386453861.

The spelling of 131591568 in words is "one hundred thirty-one million, five hundred ninety-one thousand, five hundred sixty-eight".