13223131231 has 2 divisors, whose sum is σ = 13223131232. Its totient is φ = 13223131230.

The previous prime is 13223131217. The next prime is 13223131261. The reversal of 13223131231 is 13213132231.

13223131231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13223131231 - 2¹⁵ = 13223098463 is a prime.

It is a super-2 number, since 2×13223131231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13223131211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6611565615 + 6611565616.

It is an arithmetic number, because the mean of its divisors is an integer number (6611565616).

Almost surely, 2^13223131231 is an apocalyptic number.

13223131231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13223131231 is an equidigital number, since it uses as much as digits as its factorization.

13223131231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 22.

Adding to 13223131231 its reverse (13213132231), we get a palindrome (26436263462).

The spelling of 13223131231 in words is "thirteen billion, two hundred twenty-three million, one hundred thirty-one thousand, two hundred thirty-one".