13525303021 has 2 divisors, whose sum is σ = 13525303022. Its totient is φ = 13525303020.

The previous prime is 13525303013. The next prime is 13525303027. The reversal of 13525303021 is 12030352531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13427015625 + 98287396 = 115875^2 + 9914^2 .

It is a cyclic number.

It is not a de Polignac number, because 13525303021 - 2³ = 13525303013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13525303027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6762651510 + 6762651511.

It is an arithmetic number, because the mean of its divisors is an integer number (6762651511).

Almost surely, 2^13525303021 is an apocalyptic number.

It is an amenable number.

13525303021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13525303021 is an equidigital number, since it uses as much as digits as its factorization.

13525303021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 13525303021 its reverse (12030352531), we get a palindrome (25555655552).

The spelling of 13525303021 in words is "thirteen billion, five hundred twenty-five million, three hundred three thousand, twenty-one".