118515155 has 32 divisors (see below), whose sum is σ = 159952320. Its totient is φ = 83566080.

The previous prime is 118515127. The next prime is 118515157. The reversal of 118515155 is 551515811.

It is not a de Polignac number, because 118515155 - 2⁸ = 118514899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118515157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 317549 + ... + 317921.

It is an arithmetic number, because the mean of its divisors is an integer number (4998510).

Almost surely, 2^118515155 is an apocalyptic number.

118515155 is a deficient number, since it is larger than the sum of its proper divisors (41437165).

118515155 is a wasteful number, since it uses less digits than its factorization.

118515155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551.

The product of its digits is 5000, while the sum is 32.

The square root of 118515155 is about 10886.4665984882. The cubic root of 118515155 is about 491.1995530342.

The spelling of 118515155 in words is "one hundred eighteen million, five hundred fifteen thousand, one hundred fifty-five".