231323113322131 has 4 divisors (see below), whose sum is σ = 231339511090072. Its totient is φ = 231306715554192.

The previous prime is 231323113322099. The next prime is 231323113322137. The reversal of 231323113322131 is 131223311323132.

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 231323113322131 - 2⁵ = 231323113322099 is a prime.

It is a super-2 number, since 2×231323113322131² (a number of 30 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 = 231323113322093 and 231323113322102.

It is not an unprimeable number, because it can be changed into a prime (231323113322137) 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, 8198862810 + ... + 8198891023.

It is an arithmetic number, because the mean of its divisors is an integer number (57834877772518).

Almost surely, 2^{231323113322131} is an apocalyptic number.

231323113322131 is a deficient number, since it is larger than the sum of its proper divisors (16397767941).

231323113322131 is a wasteful number, since it uses less digits than its factorization.

231323113322131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16397767940.

The product of its digits is 11664, while the sum is 31.

Adding to 231323113322131 its reverse (131223311323132), we get a palindrome (362546424645263).

The spelling of 231323113322131 in words is "two hundred thirty-one trillion, three hundred twenty-three billion, one hundred thirteen million, three hundred twenty-two thousand, one hundred thirty-one".