231331133131 has 8 divisors (see below), whose sum is σ = 264397478400. Its totient is φ = 198269548008.

The previous prime is 231331133113. The next prime is 231331133147. The reversal of 231331133131 is 131331133132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231331133131 - 2²⁹ = 230794262219 is a prime.

It is a super-2 number, since 2×231331133131² (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 = 231331133096 and 231331133105.

It is not an unprimeable number, because it can be changed into a prime (231331133101) 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 7 ways as a sum of consecutive naturals, for example, 1085281 + ... + 1280818.

It is an arithmetic number, because the mean of its divisors is an integer number (33049684800).

Almost surely, 2^231331133131 is an apocalyptic number.

231331133131 is a deficient number, since it is larger than the sum of its proper divisors (33066345269).

231331133131 is a wasteful number, since it uses less digits than its factorization.

231331133131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380073.

The product of its digits is 1458, while the sum is 25.

Adding to 231331133131 its reverse (131331133132), we get a palindrome (362662266263).

Subtracting from 231331133131 its reverse (131331133132), we obtain a palindrome (99999999999).

The spelling of 231331133131 in words is "two hundred thirty-one billion, three hundred thirty-one million, one hundred thirty-three thousand, one hundred thirty-one".