111144231 has 40 divisors (see below), whose sum is σ = 183532800. Its totient is φ = 66465360.

The previous prime is 111144227. The next prime is 111144239. The reversal of 111144231 is 132441111.

It is not a de Polignac number, because 111144231 - 2² = 111144227 is a prime.

It is a super-2 number, since 2×111144231² = 24706080169162722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111144239) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 69600 + ... + 71178.

It is an arithmetic number, because the mean of its divisors is an integer number (4588320).

Almost surely, 2^111144231 is an apocalyptic number.

111144231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111144231 is a deficient number, since it is larger than the sum of its proper divisors (72388569).

111144231 is a wasteful number, since it uses less digits than its factorization.

111144231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681 (or 1672 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 111144231 is about 10542.4964311116. The cubic root of 111144231 is about 480.7976191693.

Adding to 111144231 its reverse (132441111), we get a palindrome (243585342).

The spelling of 111144231 in words is "one hundred eleven million, one hundred forty-four thousand, two hundred thirty-one".