111948555 has 16 divisors (see below), whose sum is σ = 185294880. Its totient is φ = 57646848.

The previous prime is 111948541. The next prime is 111948581. The reversal of 111948555 is 555849111.

It is a happy number.

It is not a de Polignac number, because 111948555 - 2⁵ = 111948523 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 128242 + ... + 129111.

It is an arithmetic number, because the mean of its divisors is an integer number (11580930).

Almost surely, 2^111948555 is an apocalyptic number.

111948555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

111948555 is a deficient number, since it is larger than the sum of its proper divisors (73346325).

111948555 is a wasteful number, since it uses less digits than its factorization.

111948555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257390.

The product of its digits is 36000, while the sum is 39.

The square root of 111948555 is about 10580.5744172989. The cubic root of 111948555 is about 481.9546380983.

The spelling of 111948555 in words is "one hundred eleven million, nine hundred forty-eight thousand, five hundred fifty-five".