115515450 has 96 divisors (see below), whose sum is σ = 326229120. Its totient is φ = 30038400.

The previous prime is 115515431. The next prime is 115515473. The reversal of 115515450 is 54515511.

115515450 is a `hidden beast` number, since 11 + 551 + 54 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54307 + ... + 56393.

It is an arithmetic number, because the mean of its divisors is an integer number (3398220).

Almost surely, 2^115515450 is an apocalyptic number.

115515450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 115515450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163114560).

115515450 is an abundant number, since it is smaller than the sum of its proper divisors (210713670).

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

115515450 is a wasteful number, since it uses less digits than its factorization.

115515450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149 (or 2138 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The square root of 115515450 is about 10747.8114051187. The cubic root of 115515450 is about 487.0198823377.

The spelling of 115515450 in words is "one hundred fifteen million, five hundred fifteen thousand, four hundred fifty".