13223215205 has 12 divisors (see below), whose sum is σ = 16746966252. Its totient is φ = 10021803840.

The previous prime is 13223215193. The next prime is 13223215211. The reversal of 13223215205 is 50251232231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5471117089 + 7752098116 = 73967^2 + 88046^2 .

It is not a de Polignac number, because 13223215205 - 2⁴ = 13223215189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3661136 + ... + 3664745.

It is an arithmetic number, because the mean of its divisors is an integer number (1395580521).

Almost surely, 2^13223215205 is an apocalyptic number.

It is an amenable number.

13223215205 is a deficient number, since it is larger than the sum of its proper divisors (3523751047).

13223215205 is an equidigital number, since it uses as much as digits as its factorization.

13223215205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7325924 (or 7325905 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 13223215205 its reverse (50251232231), we get a palindrome (63474447436).

The spelling of 13223215205 in words is "thirteen billion, two hundred twenty-three million, two hundred fifteen thousand, two hundred five".