131913515520 has 800 divisors, whose sum is σ = 522336532608. Its totient is φ = 31648776192.

The previous prime is 131913515509. The next prime is 131913515563. The reversal of 131913515520 is 25515319131.

131913515520 is a `hidden beast` number, since 1 + 3 + 1 + 91 + 3 + 515 + 52 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 81076947 + ... + 81078573.

Almost surely, 2^131913515520 is an apocalyptic number.

131913515520 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 131913515520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261168266304).

131913515520 is an abundant number, since it is smaller than the sum of its proper divisors (390423017088).

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

131913515520 is a wasteful number, since it uses less digits than its factorization.

131913515520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702 (or 1677 counting only the distinct ones).

The product of its (nonzero) digits is 20250, while the sum is 36.

The spelling of 131913515520 in words is "one hundred thirty-one billion, nine hundred thirteen million, five hundred fifteen thousand, five hundred twenty".