131535000156 has 96 divisors (see below), whose sum is σ = 363973091328. Its totient is φ = 36190365120.

The previous prime is 131535000139. The next prime is 131535000187. The reversal of 131535000156 is 651000535131.

131535000156 is a nontrivial binomial coefficient, being equal to C(512904, 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1 + ... + 512903.

It is an arithmetic number, because the mean of its divisors is an integer number (3791386368).

Almost surely, 2^131535000156 is an apocalyptic number.

131535000156 is the 512903-rd triangular number and also the 256452-nd hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131535000156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181986545664).

131535000156 is an abundant number, since it is smaller than the sum of its proper divisors (232438091172).

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

131535000156 is a wasteful number, since it uses less digits than its factorization.

131535000156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513031 (or 513029 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 30.

Adding to 131535000156 its reverse (651000535131), we get a palindrome (782535535287).

The spelling of 131535000156 in words is "one hundred thirty-one billion, five hundred thirty-five million, one hundred fifty-six", and thus it is an aban number.