13213440131 has 4 divisors (see below), whose sum is σ = 13787937552. Its totient is φ = 12638942712.

The previous prime is 13213440113. The next prime is 13213440173. The reversal of 13213440131 is 13104431231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13104431231 = 29 ⋅451876939.

It is a cyclic number.

It is not a de Polignac number, because 13213440131 - 2⁶ = 13213440067 is a prime.

It is a super-2 number, since 2×13213440131² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 574497397 = 13213440131 / (1 + 3 + 2 + 1 + 3 + 4 + 4 + 0 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13213440097 and 13213440106.

It is not an unprimeable number, because it can be changed into a prime (13213440101) 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, 287248676 + ... + 287248721.

It is an arithmetic number, because the mean of its divisors is an integer number (3446984388).

Almost surely, 2^13213440131 is an apocalyptic number.

13213440131 is a deficient number, since it is larger than the sum of its proper divisors (574497421).

13213440131 is an equidigital number, since it uses as much as digits as its factorization.

13213440131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574497420.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 13213440131 its reverse (13104431231), we get a palindrome (26317871362).

The spelling of 13213440131 in words is "thirteen billion, two hundred thirteen million, four hundred forty thousand, one hundred thirty-one".