1115015500 has 96 divisors (see below), whose sum is σ = 2522520000. Its totient is φ = 430272000.

The previous prime is 1115015497. The next prime is 1115015509. The reversal of 1115015500 is 55105111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1115015509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2234251 + ... + 2234749.

It is an arithmetic number, because the mean of its divisors is an integer number (26276250).

Almost surely, 2^1115015500 is an apocalyptic number.

1115015500 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 1115015500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1261260000).

1115015500 is an abundant number, since it is smaller than the sum of its proper divisors (1407504500).

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

1115015500 is a wasteful number, since it uses less digits than its factorization.

1115015500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 19.

The square root of 1115015500 is about 33391.8478075113. The cubic root of 1115015500 is about 1036.9559348029.

The spelling of 1115015500 in words is "one billion, one hundred fifteen million, fifteen thousand, five hundred".