231103231 has 2 divisors, whose sum is σ = 231103232. Its totient is φ = 231103230.

The previous prime is 231103211. The next prime is 231103247. The reversal of 231103231 is 132301132.

It is an a-pointer prime, because the next prime (231103247) can be obtained adding 231103231 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231103231 is a prime.

It is a super-2 number, since 2×231103231² = 106817406757278722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231103211) 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 as a sum of consecutive naturals, namely, 115551615 + 115551616.

It is an arithmetic number, because the mean of its divisors is an integer number (115551616).

Almost surely, 2^231103231 is an apocalyptic number.

231103231 is a deficient number, since it is larger than the sum of its proper divisors (1).

231103231 is an equidigital number, since it uses as much as digits as its factorization.

231103231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 231103231 is about 15202.0798248134. The cubic root of 231103231 is about 613.6706306414.

Adding to 231103231 its reverse (132301132), we get a palindrome (363404363).

The spelling of 231103231 in words is "two hundred thirty-one million, one hundred three thousand, two hundred thirty-one".