131233210231 has 4 divisors (see below), whose sum is σ = 131233935672. Its totient is φ = 131232484792.

The previous prime is 131233210189. The next prime is 131233210237. The reversal of 131233210231 is 132012332131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 132012332131 = 6653 ⋅19842527.

It is a cyclic number.

It is not a de Polignac number, because 131233210231 - 2⁹ = 131233209719 is a prime.

It is a super-2 number, since 2×131233210231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131233210237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154005 + ... + 534961.

It is an arithmetic number, because the mean of its divisors is an integer number (32808483918).

Almost surely, 2^131233210231 is an apocalyptic number.

131233210231 is a deficient number, since it is larger than the sum of its proper divisors (725441).

131233210231 is an equidigital number, since it uses as much as digits as its factorization.

131233210231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725440.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 131233210231 its reverse (132012332131), we get a palindrome (263245542362).

The spelling of 131233210231 in words is "one hundred thirty-one billion, two hundred thirty-three million, two hundred ten thousand, two hundred thirty-one".