111243155 has 16 divisors (see below), whose sum is σ = 143342784. Its totient is φ = 82575360.

The previous prime is 111243151. The next prime is 111243179. The reversal of 111243155 is 551342111.

It is not a de Polignac number, because 111243155 - 2² = 111243151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111243155.

It is not an unprimeable number, because it can be changed into a prime (111243151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3182 + ... + 15251.

It is an arithmetic number, because the mean of its divisors is an integer number (8958924).

Almost surely, 2^111243155 is an apocalyptic number.

111243155 is a deficient number, since it is larger than the sum of its proper divisors (32099629).

111243155 is a wasteful number, since it uses less digits than its factorization.

111243155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18526.

The product of its digits is 600, while the sum is 23.

The square root of 111243155 is about 10547.1870657536. The cubic root of 111243155 is about 480.9402216215.

Adding to 111243155 its reverse (551342111), we get a palindrome (662585266).

The spelling of 111243155 in words is "one hundred eleven million, two hundred forty-three thousand, one hundred fifty-five".