231331134013 has 8 divisors (see below), whose sum is σ = 264382191360. Its totient is φ = 198281014800.

The previous prime is 231331133953. The next prime is 231331134019. The reversal of 231331134013 is 310431133132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231331134013 is a prime.

It is a super-3 number, since 3×231331134013³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231331134019) 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, 413103 + ... + 795811.

It is an arithmetic number, because the mean of its divisors is an integer number (33047773920).

Almost surely, 2^231331134013 is an apocalyptic number.

It is an amenable number.

231331134013 is a deficient number, since it is larger than the sum of its proper divisors (33051057347).

231331134013 is an equidigital number, since it uses as much as digits as its factorization.

231331134013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469067.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 231331134013 its reverse (310431133132), we get a palindrome (541762267145).

The spelling of 231331134013 in words is "two hundred thirty-one billion, three hundred thirty-one million, one hundred thirty-four thousand, thirteen".