131505000000 has 448 divisors, whose sum is σ = 475058158848. Its totient is φ = 31840000000.

The previous prime is 131504999971. The next prime is 131505000013. The reversal of 131505000000 is 505131.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 164999602 + ... + 165000398.

It is an arithmetic number, because the mean of its divisors is an integer number (1060397676).

Almost surely, 2^131505000000 is an apocalyptic number.

131505000000 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 131505000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237529079424).

131505000000 is an abundant number, since it is smaller than the sum of its proper divisors (343553158848).

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

131505000000 is an frugal number, since it uses more digits than its factorization.

131505000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 15.

Adding to 131505000000 its reverse (505131), we get a palindrome (131505505131).

The spelling of 131505000000 in words is "one hundred thirty-one billion, five hundred five million", and thus it is an aban number.