111355231 has 4 divisors (see below), whose sum is σ = 119921032. Its totient is φ = 102789432.

The previous prime is 111355229. The next prime is 111355241. The reversal of 111355231 is 132553111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111355231 - 2¹ = 111355229 is a prime.

It is a super-2 number, since 2×111355231² = 24799974942126722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111355201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4282881 + ... + 4282906.

It is an arithmetic number, because the mean of its divisors is an integer number (29980258).

Almost surely, 2^111355231 is an apocalyptic number.

111355231 is a deficient number, since it is larger than the sum of its proper divisors (8565801).

111355231 is an equidigital number, since it uses as much as digits as its factorization.

111355231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8565800.

The product of its digits is 450, while the sum is 22.

The square root of 111355231 is about 10552.4988036010. The cubic root of 111355231 is about 481.1016810377.

The spelling of 111355231 in words is "one hundred eleven million, three hundred fifty-five thousand, two hundred thirty-one".