115215851520 has 1680 divisors, whose sum is σ = 531521663904. Its totient is φ = 23357030400.

The previous prime is 115215851449. The next prime is 115215851533. The reversal of 115215851520 is 25158512511.

It is a happy number.

115215851520 is a `hidden beast` number, since 1 + 1 + 5 + 21 + 585 + 1 + 52 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1680).

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 119 ways as a sum of consecutive naturals, for example, 2810142700 + ... + 2810142740.

Almost surely, 2^115215851520 is an apocalyptic number.

115215851520 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 115215851520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265760831952).

115215851520 is an abundant number, since it is smaller than the sum of its proper divisors (416305812384).

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

115215851520 is an equidigital number, since it uses as much as digits as its factorization.

115215851520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 36.

The spelling of 115215851520 in words is "one hundred fifteen billion, two hundred fifteen million, eight hundred fifty-one thousand, five hundred twenty".