113231 has 4 divisors (see below), whose sum is σ = 114000. Its totient is φ = 112464.

The previous prime is 113227. The next prime is 113233. The reversal of 113231 is 132311.

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 113231 - 2² = 113227 is a prime.

It is a super-2 number, since 2×113231² = 25642518722, 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 (113233) 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, 86 + ... + 483.

It is an arithmetic number, because the mean of its divisors is an integer number (28500).

2¹¹³²³¹ is an apocalyptic number.

113231 is a deficient number, since it is larger than the sum of its proper divisors (769).

113231 is an equidigital number, since it uses as much as digits as its factorization.

113231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768.

The product of its digits is 18, while the sum is 11.

The square root of 113231 is about 336.4981426397. The cubic root of 113231 is about 48.3788025019.

Adding to 113231 its reverse (132311), we get a palindrome (245542).

The spelling of 113231 in words is "one hundred thirteen thousand, two hundred thirty-one".