13223333231 has 4 divisors (see below), whose sum is σ = 13359656352. Its totient is φ = 13087010112.

The previous prime is 13223333183. The next prime is 13223333239. The reversal of 13223333231 is 13233332231.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13223333231 is a prime.

It is a super-2 number, since 2×13223333231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13223333231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13223333239) 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, 68161415 + ... + 68161608.

It is an arithmetic number, because the mean of its divisors is an integer number (3339914088).

Almost surely, 2^13223333231 is an apocalyptic number.

13223333231 is a deficient number, since it is larger than the sum of its proper divisors (136323121).

13223333231 is an equidigital number, since it uses as much as digits as its factorization.

13223333231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136323120.

The product of its digits is 5832, while the sum is 26.

Adding to 13223333231 its reverse (13233332231), we get a palindrome (26456665462).

The spelling of 13223333231 in words is "thirteen billion, two hundred twenty-three million, three hundred thirty-three thousand, two hundred thirty-one".