131132440 has 64 divisors (see below), whose sum is σ = 305091360. Its totient is φ = 50688000.

The previous prime is 131132437. The next prime is 131132483. The reversal of 131132440 is 44231131.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 371304 + ... + 371656.

Almost surely, 2^131132440 is an apocalyptic number.

131132440 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 131132440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152545680).

131132440 is an abundant number, since it is smaller than the sum of its proper divisors (173958920).

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

131132440 is a wasteful number, since it uses less digits than its factorization.

131132440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 131132440 is about 11451.3073489449. The cubic root of 131132440 is about 508.0464028541.

Adding to 131132440 its reverse (44231131), we get a palindrome (175363571).

The spelling of 131132440 in words is "one hundred thirty-one million, one hundred thirty-two thousand, four hundred forty".