131131328 has 56 divisors (see below), whose sum is σ = 269546832. Its totient is φ = 63258624.

The previous prime is 131131321. The next prime is 131131337. The reversal of 131131328 is 823131131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131131321) 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, 226976 + ... + 227552.

Almost surely, 2^131131328 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 131131328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134773416).

131131328 is an abundant number, since it is smaller than the sum of its proper divisors (138415504).

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

131131328 is an equidigital number, since it uses as much as digits as its factorization.

131131328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 699 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 131131328 is about 11451.2587954338. The cubic root of 131131328 is about 508.0449667762.

Adding to 131131328 its reverse (823131131), we get a palindrome (954262459).

It can be divided in two parts, 13113 and 1328, that added together give a palindrome (14441).

The spelling of 131131328 in words is "one hundred thirty-one million, one hundred thirty-one thousand, three hundred twenty-eight".