13222312231 has 4 divisors (see below), whose sum is σ = 13648838464. Its totient is φ = 12795786000.

The previous prime is 13222312157. The next prime is 13222312273. The reversal of 13222312231 is 13221322231.

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 13222312231 - 2⁹ = 13222311719 is a prime.

It is a super-2 number, since 2×13222312231² (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 (13222312331) 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, 213263070 + ... + 213263131.

It is an arithmetic number, because the mean of its divisors is an integer number (3412209616).

Almost surely, 2^13222312231 is an apocalyptic number.

13222312231 is a deficient number, since it is larger than the sum of its proper divisors (426526233).

13222312231 is an equidigital number, since it uses as much as digits as its factorization.

13222312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426526232.

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

Adding to 13222312231 its reverse (13221322231), we get a palindrome (26443634462).

The spelling of 13222312231 in words is "thirteen billion, two hundred twenty-two million, three hundred twelve thousand, two hundred thirty-one".