13231013209 has 2 divisors, whose sum is σ = 13231013210. Its totient is φ = 13231013208.

The previous prime is 13231013171. The next prime is 13231013233. The reversal of 13231013209 is 90231013231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8376825625 + 4854187584 = 91525^2 + 69672^2 .

It is a cyclic number.

It is not a de Polignac number, because 13231013209 - 2¹¹ = 13231011161 is a prime.

It is not a weakly prime, because it can be changed into another prime (13231013239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615506604 + 6615506605.

It is an arithmetic number, because the mean of its divisors is an integer number (6615506605).

Almost surely, 2^13231013209 is an apocalyptic number.

It is an amenable number.

13231013209 is a deficient number, since it is larger than the sum of its proper divisors (1).

13231013209 is an equidigital number, since it uses as much as digits as its factorization.

13231013209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The spelling of 13231013209 in words is "thirteen billion, two hundred thirty-one million, thirteen thousand, two hundred nine".