131599340 has 72 divisors (see below), whose sum is σ = 294277536. Its totient is φ = 49401600.

The previous prime is 131599337. The next prime is 131599357. The reversal of 131599340 is 43995131.

It is a self number, because there is not a number n which added to its sum of digits gives 131599340.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 787937 + ... + 788103.

It is an arithmetic number, because the mean of its divisors is an integer number (4087188).

Almost surely, 2^131599340 is an apocalyptic number.

131599340 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 131599340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147138768).

131599340 is an abundant number, since it is smaller than the sum of its proper divisors (162678196).

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

131599340 is a wasteful number, since it uses less digits than its factorization.

131599340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 131599340 is about 11471.6755532921. The cubic root of 131599340 is about 508.6486588487.

The spelling of 131599340 in words is "one hundred thirty-one million, five hundred ninety-nine thousand, three hundred forty".