111557055 has 32 divisors (see below), whose sum is σ = 185457600. Its totient is φ = 57193472.

The previous prime is 111557053. The next prime is 111557057. The reversal of 111557055 is 550755111.

It is an interprime number because it is at equal distance from previous prime (111557053) and next prime (111557057).

It is a cyclic number.

It is not a de Polignac number, because 111557055 - 2¹ = 111557053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111557051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137491 + ... + 138299.

It is an arithmetic number, because the mean of its divisors is an integer number (5795550).

Almost surely, 2^111557055 is an apocalyptic number.

111557055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

111557055 is a deficient number, since it is larger than the sum of its proper divisors (73900545).

111557055 is a wasteful number, since it uses less digits than its factorization.

111557055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163.

The product of its (nonzero) digits is 4375, while the sum is 30.

The square root of 111557055 is about 10562.0573280020. The cubic root of 111557055 is about 481.3921606217.

The spelling of 111557055 in words is "one hundred eleven million, five hundred fifty-seven thousand, fifty-five".