231113231 has 4 divisors (see below), whose sum is σ = 235473912. Its totient is φ = 226752552.

The previous prime is 231113219. The next prime is 231113237. The reversal of 231113231 is 132311132.

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 231113231 - 2⁶ = 231113167 is a prime.

It is a super-2 number, since 2×231113231² = 106826651086518722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231113237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2180261 + ... + 2180366.

It is an arithmetic number, because the mean of its divisors is an integer number (58868478).

Almost surely, 2^231113231 is an apocalyptic number.

231113231 is a deficient number, since it is larger than the sum of its proper divisors (4360681).

231113231 is an equidigital number, since it uses as much as digits as its factorization.

231113231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4360680.

The product of its digits is 108, while the sum is 17.

The square root of 231113231 is about 15202.4087236201. The cubic root of 231113231 is about 613.6794818343.

Adding to 231113231 its reverse (132311132), we get a palindrome (363424363).

The spelling of 231113231 in words is "two hundred thirty-one million, one hundred thirteen thousand, two hundred thirty-one".