231313210133 has 8 divisors (see below), whose sum is σ = 237763728216. Its totient is φ = 224901203200.

The previous prime is 231313210129. The next prime is 231313210153. The reversal of 231313210133 is 331012313132.

It can be written as a sum of positive squares in 4 ways, for example, as 242642929 + 231070567204 = 15577^2 + 480698^2 .

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

It is not a de Polignac number, because 231313210133 - 2² = 231313210129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231313210099 and 231313210108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231313210153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9615608 + ... + 9639633.

It is an arithmetic number, because the mean of its divisors is an integer number (29720466027).

Almost surely, 2^231313210133 is an apocalyptic number.

It is an amenable number.

231313210133 is a deficient number, since it is larger than the sum of its proper divisors (6450518083).

231313210133 is a wasteful number, since it uses less digits than its factorization.

231313210133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19255575.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 231313210133 its reverse (331012313132), we get a palindrome (562325523265).

The spelling of 231313210133 in words is "two hundred thirty-one billion, three hundred thirteen million, two hundred ten thousand, one hundred thirty-three".