111155 has 16 divisors (see below), whose sum is σ = 152064. Its totient is φ = 77280.

The previous prime is 111149. The next prime is 111187. The reversal of 111155 is 551111.

It is not a de Polignac number, because 111155 - 2⁶ = 111091 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2342 + ... + 2388.

It is an arithmetic number, because the mean of its divisors is an integer number (9504).

2¹¹¹¹⁵⁵ is an apocalyptic number.

111155 is a deficient number, since it is larger than the sum of its proper divisors (40909).

111155 is a wasteful number, since it uses less digits than its factorization.

111155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106.

The product of its digits is 25, while the sum is 14.

The square root of 111155 is about 333.3991601669. The cubic root of 111155 is about 48.0813147168.

Adding to 111155 its reverse (551111), we get a palindrome (662266).

It can be divided in two parts, 111 and 155, that multiplied together give a triangular number (17205 = T₁₈₅).

The spelling of 111155 in words is "one hundred eleven thousand, one hundred fifty-five".