13131131331231 has 16 divisors (see below), whose sum is σ = 19453732024320. Its totient is φ = 8753995697400.

The previous prime is 13131131331229. The next prime is 13131131331271. The reversal of 13131131331231 is 13213313113131.

13131131331231 is a `hidden beast` number, since 1 + 3 + 1 + 3 + 1 + 1 + 313 + 312 + 31 = 666.

It is not a de Polignac number, because 13131131331231 - 2¹ = 13131131331229 is a prime.

It is a super-2 number, since 2×13131131331231² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 13131131331195 and 13131131331204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131131331271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120076 + ... + 5126078.

It is an arithmetic number, because the mean of its divisors is an integer number (1215858251520).

Almost surely, 2^{13131131331231} is an apocalyptic number.

13131131331231 is a deficient number, since it is larger than the sum of its proper divisors (6322600693089).

13131131331231 is an equidigital number, since it uses as much as digits as its factorization.

13131131331231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5103163 (or 5103157 counting only the distinct ones).

The product of its digits is 1458, while the sum is 27.

Adding to 13131131331231 its reverse (13213313113131), we get a palindrome (26344444444362).

The spelling of 13131131331231 in words is "thirteen trillion, one hundred thirty-one billion, one hundred thirty-one million, three hundred thirty-one thousand, two hundred thirty-one".