115128155 has 8 divisors (see below), whose sum is σ = 138229632. Its totient is φ = 92051968.

The previous prime is 115128121. The next prime is 115128193. The reversal of 115128155 is 551821511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115128155 - 2²⁰ = 114079579 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5819 + ... + 16251.

It is an arithmetic number, because the mean of its divisors is an integer number (17278704).

Almost surely, 2^115128155 is an apocalyptic number.

115128155 is a deficient number, since it is larger than the sum of its proper divisors (23101477).

115128155 is a wasteful number, since it uses less digits than its factorization.

115128155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12645.

The product of its digits is 2000, while the sum is 29.

The square root of 115128155 is about 10729.7788886817. The cubic root of 115128155 is about 486.4749868046.

Adding to 115128155 its reverse (551821511), we get a palindrome (666949666).

The spelling of 115128155 in words is "one hundred fifteen million, one hundred twenty-eight thousand, one hundred fifty-five".