115840155 has 16 divisors (see below), whose sum is σ = 190354464. Its totient is φ = 60111360.

The previous prime is 115840147. The next prime is 115840189. The reversal of 115840155 is 551048511.

It is not a de Polignac number, because 115840155 - 2³ = 115840147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103806 + ... + 104915.

It is an arithmetic number, because the mean of its divisors is an integer number (11897154).

Almost surely, 2^115840155 is an apocalyptic number.

115840155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115840155 is a deficient number, since it is larger than the sum of its proper divisors (74514309).

115840155 is a wasteful number, since it uses less digits than its factorization.

115840155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208766.

The product of its (nonzero) digits is 4000, while the sum is 30.

The square root of 115840155 is about 10762.9064383186. The cubic root of 115840155 is about 487.4757805193.

Adding to 115840155 its reverse (551048511), we get a palindrome (666888666).

The spelling of 115840155 in words is "one hundred fifteen million, eight hundred forty thousand, one hundred fifty-five".