111287055 has 32 divisors (see below), whose sum is σ = 200521728. Its totient is φ = 52214400.

The previous prime is 111287021. The next prime is 111287093. The reversal of 111287055 is 550782111.

It is not a de Polignac number, because 111287055 - 2¹⁰ = 111286031 is a prime.

It is a super-2 number, since 2×111287055² = 24769617221146050, which contains 22 as substring.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 5764 + ... + 15993.

It is an arithmetic number, because the mean of its divisors is an integer number (6266304).

Almost surely, 2^111287055 is an apocalyptic number.

111287055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

111287055 is a deficient number, since it is larger than the sum of its proper divisors (89234673).

111287055 is a wasteful number, since it uses less digits than its factorization.

111287055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21807.

The product of its (nonzero) digits is 2800, while the sum is 30.

The square root of 111287055 is about 10549.2679840831. The cubic root of 111287055 is about 481.0034779451.

The spelling of 111287055 in words is "one hundred eleven million, two hundred eighty-seven thousand, fifty-five".