118331 has 4 divisors (see below), whose sum is σ = 119064. Its totient is φ = 117600.

The previous prime is 118297. The next prime is 118343. The reversal of 118331 is 133811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 118331 - 2¹⁰ = 117307 is a prime.

It is a super-2 number, since 2×118331² = 28004451122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5 + ... + 486.

It is an arithmetic number, because the mean of its divisors is an integer number (29766).

2¹¹⁸³³¹ is an apocalyptic number.

118331 is a deficient number, since it is larger than the sum of its proper divisors (733).

118331 is an equidigital number, since it uses as much as digits as its factorization.

118331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its digits is 72, while the sum is 17.

The square root of 118331 is about 343.9927324814. The cubic root of 118331 is about 49.0945004024.

The spelling of 118331 in words is "one hundred eighteen thousand, three hundred thirty-one".