99115520 has 80 divisors (see below), whose sum is σ = 271643328. Its totient is φ = 33976320.

The previous prime is 99115501. The next prime is 99115543. The reversal of 99115520 is 2551199.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15155 + ... + 20685.

Almost surely, 2^99115520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99115520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135821664).

99115520 is an abundant number, since it is smaller than the sum of its proper divisors (172527808).

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

99115520 is an equidigital number, since it uses as much as digits as its factorization.

99115520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561 (or 5545 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 99115520 is about 9955.6777770275. The cubic root of 99115520 is about 462.7863646574.

The spelling of 99115520 in words is "ninety-nine million, one hundred fifteen thousand, five hundred twenty".