110991231 has 24 divisors (see below), whose sum is σ = 177326240. Its totient is φ = 66453696.

The previous prime is 110991229. The next prime is 110991259. The reversal of 110991231 is 132199011.

It is not a de Polignac number, because 110991231 - 2¹ = 110991229 is a prime.

It is a super-2 number, since 2×110991231² = 24638106717790722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 110991195 and 110991204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110991271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8491 + ... + 17148.

Almost surely, 2^110991231 is an apocalyptic number.

110991231 is a deficient number, since it is larger than the sum of its proper divisors (66335009).

110991231 is a wasteful number, since it uses less digits than its factorization.

110991231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25695 (or 25692 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 110991231 is about 10535.2375863100. The cubic root of 110991231 is about 480.5768975124.

The spelling of 110991231 in words is "one hundred ten million, nine hundred ninety-one thousand, two hundred thirty-one".