131500340 has 24 divisors (see below), whose sum is σ = 276455592. Its totient is φ = 52542080.

The previous prime is 131500339. The next prime is 131500351. The reversal of 131500340 is 43005131.

It can be written as a sum of positive squares in 4 ways, for example, as 15335056 + 116165284 = 3916^2 + 10778^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18122 + ... + 24318.

It is an arithmetic number, because the mean of its divisors is an integer number (11518983).

Almost surely, 2^131500340 is an apocalyptic number.

131500340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131500340 is an abundant number, since it is smaller than the sum of its proper divisors (144955252).

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

131500340 is a wasteful number, since it uses less digits than its factorization.

131500340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7267 (or 7265 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 131500340 is about 11467.3597658746. The cubic root of 131500340 is about 508.5210775354.

Adding to 131500340 its reverse (43005131), we get a palindrome (174505471).

The spelling of 131500340 in words is "one hundred thirty-one million, five hundred thousand, three hundred forty".