231323203031 has 4 divisors (see below), whose sum is σ = 231649470600. Its totient is φ = 230996935464.

The previous prime is 231323203009. The next prime is 231323203051. The reversal of 231323203031 is 130302323132.

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 231323203031 - 2⁶ = 231323202967 is a prime.

It is a super-2 number, since 2×231323203031² (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 = 231323202988 and 231323203006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231323203051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163132721 + ... + 163134138.

It is an arithmetic number, because the mean of its divisors is an integer number (57912367650).

Almost surely, 2^231323203031 is an apocalyptic number.

231323203031 is a deficient number, since it is larger than the sum of its proper divisors (326267569).

231323203031 is an equidigital number, since it uses as much as digits as its factorization.

231323203031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326267568.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 231323203031 its reverse (130302323132), we get a palindrome (361625526163).

The spelling of 231323203031 in words is "two hundred thirty-one billion, three hundred twenty-three million, two hundred three thousand, thirty-one".