111555055 has 8 divisors (see below), whose sum is σ = 137131344. Its totient is φ = 87067200.

The previous prime is 111555053. The next prime is 111555079. The reversal of 111555055 is 550555111.

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

It is not a de Polignac number, because 111555055 - 2¹ = 111555053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111555053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271881 + ... + 272290.

It is an arithmetic number, because the mean of its divisors is an integer number (17141418).

Almost surely, 2^111555055 is an apocalyptic number.

111555055 is a deficient number, since it is larger than the sum of its proper divisors (25576289).

111555055 is an equidigital number, since it uses as much as digits as its factorization.

111555055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544217.

The product of its (nonzero) digits is 3125, while the sum is 28.

The square root of 111555055 is about 10561.9626490534. The cubic root of 111555055 is about 481.3892837976.

The spelling of 111555055 in words is "one hundred eleven million, five hundred fifty-five thousand, fifty-five".