111223231 has 16 divisors (see below), whose sum is σ = 136304640. Its totient is φ = 88583040.

The previous prime is 111223223. The next prime is 111223243. The reversal of 111223231 is 132322111.

It is not a de Polignac number, because 111223231 - 2³ = 111223223 is a prime.

It is a super-2 number, since 2×111223231² = 24741214228158722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111223031) 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, 3486 + ... + 15316.

It is an arithmetic number, because the mean of its divisors is an integer number (8519040).

Almost surely, 2^111223231 is an apocalyptic number.

111223231 is a deficient number, since it is larger than the sum of its proper divisors (25081409).

111223231 is a wasteful number, since it uses less digits than its factorization.

111223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11934.

The product of its digits is 72, while the sum is 16.

The square root of 111223231 is about 10546.2425062199. The cubic root of 111223231 is about 480.9115072702.

Adding to 111223231 its reverse (132322111), we get a palindrome (243545342).

The spelling of 111223231 in words is "one hundred eleven million, two hundred twenty-three thousand, two hundred thirty-one".