131530781500 has 48 divisors (see below), whose sum is σ = 288046362240. Its totient is φ = 52468881600.

The previous prime is 131530781443. The next prime is 131530781621. The reversal of 131530781500 is 5187035131.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174895 + ... + 541894.

It is an arithmetic number, because the mean of its divisors is an integer number (6000965880).

Almost surely, 2^131530781500 is an apocalyptic number.

131530781500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131530781500 is an abundant number, since it is smaller than the sum of its proper divisors (156515580740).

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

131530781500 is a wasteful number, since it uses less digits than its factorization.

131530781500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717175 (or 717163 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 34.

The spelling of 131530781500 in words is "one hundred thirty-one billion, five hundred thirty million, seven hundred eighty-one thousand, five hundred".