115215540 has 48 divisors (see below), whose sum is σ = 351933120. Its totient is φ = 27930880.

The previous prime is 115215523. The next prime is 115215547. The reversal of 115215540 is 45512511.

It is a self number, because there is not a number n which added to its sum of digits gives 115215540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115215547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86625 + ... + 87944.

It is an arithmetic number, because the mean of its divisors is an integer number (7331940).

Almost surely, 2^115215540 is an apocalyptic number.

115215540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115215540 is an abundant number, since it is smaller than the sum of its proper divisors (236717580).

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

115215540 is a wasteful number, since it uses less digits than its factorization.

115215540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174592 (or 174590 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 115215540 is about 10733.8501945947. The cubic root of 115215540 is about 486.5980376943.

The spelling of 115215540 in words is "one hundred fifteen million, two hundred fifteen thousand, five hundred forty".