115998855 has 16 divisors (see below), whose sum is σ = 212112384. Its totient is φ = 53028000.

The previous prime is 115998853. The next prime is 115998863. The reversal of 115998855 is 558899511.

It is a happy number.

It is not a de Polignac number, because 115998855 - 2¹ = 115998853 is a prime.

It is a super-2 number, since 2×115998855² = 26911468722622050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 115998798 and 115998807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115998851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552271 + ... + 552480.

It is an arithmetic number, because the mean of its divisors is an integer number (13257024).

Almost surely, 2^115998855 is an apocalyptic number.

115998855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115998855 is a deficient number, since it is larger than the sum of its proper divisors (96113529).

115998855 is a wasteful number, since it uses less digits than its factorization.

115998855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104766.

The product of its digits is 648000, while the sum is 51.

The square root of 115998855 is about 10770.2764588473. The cubic root of 115998855 is about 487.6982914573.

The spelling of 115998855 in words is "one hundred fifteen million, nine hundred ninety-eight thousand, eight hundred fifty-five".