13525303230821 has 2 divisors, whose sum is σ = 13525303230822. Its totient is φ = 13525303230820.

The previous prime is 13525303230811. The next prime is 13525303230827. The reversal of 13525303230821 is 12803230352531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8078498752900 + 5446804477921 = 2842270^2 + 2333839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13525303230821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13525303230827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6762651615410 + 6762651615411.

It is an arithmetic number, because the mean of its divisors is an integer number (6762651615411).

Almost surely, 2^{13525303230821} is an apocalyptic number.

It is an amenable number.

13525303230821 is a deficient number, since it is larger than the sum of its proper divisors (1).

13525303230821 is an equidigital number, since it uses as much as digits as its factorization.

13525303230821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 13525303230821 in words is "thirteen trillion, five hundred twenty-five billion, three hundred three million, two hundred thirty thousand, eight hundred twenty-one".