13531106209 has 2 divisors, whose sum is σ = 13531106210. Its totient is φ = 13531106208.

The previous prime is 13531106167. The next prime is 13531106213. The reversal of 13531106209 is 90260113531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13201320609 + 329785600 = 114897^2 + 18160^2 .

It is a cyclic number.

It is not a de Polignac number, because 13531106209 - 2⁷ = 13531106081 is a prime.

It is not a weakly prime, because it can be changed into another prime (13531106279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765553104 + 6765553105.

It is an arithmetic number, because the mean of its divisors is an integer number (6765553105).

Almost surely, 2^13531106209 is an apocalyptic number.

It is an amenable number.

13531106209 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531106209 is an equidigital number, since it uses as much as digits as its factorization.

13531106209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The spelling of 13531106209 in words is "thirteen billion, five hundred thirty-one million, one hundred six thousand, two hundred nine".