13531202449 has 2 divisors, whose sum is σ = 13531202450.
Its totient is φ = 13531202448.
The previous prime is 13531202383. The next prime is 13531202453. The reversal of 13531202449 is 94420213531.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 10896228225 + 2634974224 = 104385^2 + 51332^2
It is a cyclic number.
It is not a de Polignac number, because 13531202449 - 223 = 13522813841 is a prime.
It is not a weakly prime, because it can be changed into another prime (13531202459) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765601224 + 6765601225.
It is an arithmetic number, because the mean of its divisors is an integer number (6765601225).
Almost surely, 213531202449 is an apocalyptic number.
It is an amenable number.
13531202449 is a deficient number, since it is larger than the sum of its proper divisors (1).
13531202449 is an equidigital number, since it uses as much as digits as its factorization.
13531202449 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 25920, while the sum is 34.
The spelling of 13531202449 in words is "thirteen billion, five hundred thirty-one million, two hundred two thousand, four hundred forty-nine".