131320500 has 48 divisors (see below), whose sum is σ = 382409664. Its totient is φ = 35018400.

The previous prime is 131320487. The next prime is 131320507. The reversal of 131320500 is 5023131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 131320500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131320507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42274 + ... + 45273.

It is an arithmetic number, because the mean of its divisors is an integer number (7966868).

Almost surely, 2^131320500 is an apocalyptic number.

131320500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131320500 is an abundant number, since it is smaller than the sum of its proper divisors (251089164).

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

131320500 is a wasteful number, since it uses less digits than its factorization.

131320500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87569 (or 87557 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 131320500 is about 11459.5156965729. The cubic root of 131320500 is about 508.2891537943.

Adding to 131320500 its reverse (5023131), we get a palindrome (136343631).

The spelling of 131320500 in words is "one hundred thirty-one million, three hundred twenty thousand, five hundred".