131289568 has 48 divisors (see below), whose sum is σ = 265670496. Its totient is φ = 63843840.

The previous prime is 131289541. The next prime is 131289569. The reversal of 131289568 is 865982131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131289569) 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, 200730 + ... + 201382.

It is an arithmetic number, because the mean of its divisors is an integer number (5534802).

Almost surely, 2^131289568 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 131289568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132835248).

131289568 is an abundant number, since it is smaller than the sum of its proper divisors (134380928).

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

131289568 is a wasteful number, since it uses less digits than its factorization.

131289568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 819 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The square root of 131289568 is about 11458.1659963539. The cubic root of 131289568 is about 508.2492421920.

The spelling of 131289568 in words is "one hundred thirty-one million, two hundred eighty-nine thousand, five hundred sixty-eight".