131324840 has 64 divisors (see below), whose sum is σ = 307184400. Its totient is φ = 50485248.

The previous prime is 131324839. The next prime is 131324849. The reversal of 131324840 is 48423131.

It can be written as a sum of positive squares in 8 ways, for example, as 90288004 + 41036836 = 9502^2 + 6406^2 .

It is not an unprimeable number, because it can be changed into a prime (131324849) 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 15 ways as a sum of consecutive naturals, for example, 131222 + ... + 132218.

Almost surely, 2^131324840 is an apocalyptic number.

131324840 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 131324840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153592200).

131324840 is an abundant number, since it is smaller than the sum of its proper divisors (175859560).

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

131324840 is a wasteful number, since it uses less digits than its factorization.

131324840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 131324840 is about 11459.7050572866. The cubic root of 131324840 is about 508.2947532009.

Adding to 131324840 its reverse (48423131), we get a palindrome (179747971).

The spelling of 131324840 in words is "one hundred thirty-one million, three hundred twenty-four thousand, eight hundred forty".