131432340 has 96 divisors (see below), whose sum is σ = 399087360. Its totient is φ = 32126976.

The previous prime is 131432317. The next prime is 131432383. The reversal of 131432340 is 43234131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129756 + ... + 130764.

It is an arithmetic number, because the mean of its divisors is an integer number (4157160).

Almost surely, 2^131432340 is an apocalyptic number.

131432340 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 131432340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199543680).

131432340 is an abundant number, since it is smaller than the sum of its proper divisors (267655020).

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

131432340 is a wasteful number, since it uses less digits than its factorization.

131432340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201 (or 1199 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 131432340 is about 11464.3944454123. The cubic root of 131432340 is about 508.4334088256.

Adding to 131432340 its reverse (43234131), we get a palindrome (174666471).

The spelling of 131432340 in words is "one hundred thirty-one million, four hundred thirty-two thousand, three hundred forty".