231100312231 has 4 divisors (see below), whose sum is σ = 231889050792. Its totient is φ = 230311573672.

The previous prime is 231100312199. The next prime is 231100312237. The reversal of 231100312231 is 132213001132.

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 231100312231 - 2⁵ = 231100312199 is a prime.

It is a super-2 number, since 2×231100312231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231100312199 and 231100312208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231100312237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394368841 + ... + 394369426.

It is an arithmetic number, because the mean of its divisors is an integer number (57972262698).

Almost surely, 2^231100312231 is an apocalyptic number.

231100312231 is a deficient number, since it is larger than the sum of its proper divisors (788738561).

231100312231 is an equidigital number, since it uses as much as digits as its factorization.

231100312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788738560.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 231100312231 its reverse (132213001132), we get a palindrome (363313313363).

The spelling of 231100312231 in words is "two hundred thirty-one billion, one hundred million, three hundred twelve thousand, two hundred thirty-one".