115501540 has 96 divisors (see below), whose sum is σ = 304819200. Its totient is φ = 35713920.

The previous prime is 115501433. The next prime is 115501541. The reversal of 115501540 is 45105511.

It is a happy number.

It is a super-3 number, since 3×115501540³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (115501541) 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, 275451 + ... + 275869.

It is an arithmetic number, because the mean of its divisors is an integer number (3175200).

Almost surely, 2^115501540 is an apocalyptic number.

115501540 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 115501540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152409600).

115501540 is an abundant number, since it is smaller than the sum of its proper divisors (189317660).

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

115501540 is a wasteful number, since it uses less digits than its factorization.

115501540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 115501540 is about 10747.1642771477. The cubic root of 115501540 is about 487.0003330956. Note that the first 3 decimals are identical.

The spelling of 115501540 in words is "one hundred fifteen million, five hundred one thousand, five hundred forty".