115511500 has 72 divisors (see below), whose sum is σ = 273375648. Its totient is φ = 42619200.

The previous prime is 115511489. The next prime is 115511503. The reversal of 115511500 is 5115511.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (115511503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83817 + ... + 85183.

It is an arithmetic number, because the mean of its divisors is an integer number (3796884).

Almost surely, 2^115511500 is an apocalyptic number.

115511500 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 115511500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136687824).

115511500 is an abundant number, since it is smaller than the sum of its proper divisors (157864148).

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

115511500 is a wasteful number, since it uses less digits than its factorization.

115511500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1387 counting only the distinct ones).

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

The square root of 115511500 is about 10747.6276452062. The cubic root of 115511500 is about 487.0143311309.

The spelling of 115511500 in words is "one hundred fifteen million, five hundred eleven thousand, five hundred".