13231222231 has 4 divisors (see below), whose sum is σ = 13236994792. Its totient is φ = 13225449672.

The previous prime is 13231222181. The next prime is 13231222267. The reversal of 13231222231 is 13222213231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13231222231 - 2¹³ = 13231214039 is a prime.

It is a super-2 number, since 2×13231222231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231222931) 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, 2882841 + ... + 2887426.

It is an arithmetic number, because the mean of its divisors is an integer number (3309248698).

Almost surely, 2^13231222231 is an apocalyptic number.

13231222231 is a deficient number, since it is larger than the sum of its proper divisors (5772561).

13231222231 is an equidigital number, since it uses as much as digits as its factorization.

13231222231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5772560.

The product of its digits is 864, while the sum is 22.

Adding to 13231222231 its reverse (13222213231), we get a palindrome (26453435462).

The spelling of 13231222231 in words is "thirteen billion, two hundred thirty-one million, two hundred twenty-two thousand, two hundred thirty-one".