13535521 has 2 divisors, whose sum is σ = 13535522. Its totient is φ = 13535520.

The previous prime is 13535513. The next prime is 13535537. The reversal of 13535521 is 12553531.

13535521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8059921 + 5475600 = 2839^2 + 2340^2 .

It is a cyclic number.

It is not a de Polignac number, because 13535521 - 2³ = 13535513 is a prime.

It is not a weakly prime, because it can be changed into another prime (13535591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6767760 + 6767761.

It is an arithmetic number, because the mean of its divisors is an integer number (6767761).

Almost surely, 2^13535521 is an apocalyptic number.

It is an amenable number.

13535521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13535521 is an equidigital number, since it uses as much as digits as its factorization.

13535521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2250, while the sum is 25.

The square root of 13535521 is about 3679.0652345399. The cubic root of 13535521 is about 238.3188122058.

The spelling of 13535521 in words is "thirteen million, five hundred thirty-five thousand, five hundred twenty-one".