13535521213 has 2 divisors, whose sum is σ = 13535521214. Its totient is φ = 13535521212.

The previous prime is 13535521199. The next prime is 13535521231. The reversal of 13535521213 is 31212553531.

Together with next prime (13535521231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10753275204 + 2782246009 = 103698^2 + 52747^2 .

It is an emirp because it is prime and its reverse (31212553531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13535521213 - 2²¹ = 13533424061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13535521253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6767760606 + 6767760607.

It is an arithmetic number, because the mean of its divisors is an integer number (6767760607).

Almost surely, 2^13535521213 is an apocalyptic number.

It is an amenable number.

13535521213 is a deficient number, since it is larger than the sum of its proper divisors (1).

13535521213 is an equidigital number, since it uses as much as digits as its factorization.

13535521213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 31.

The spelling of 13535521213 in words is "thirteen billion, five hundred thirty-five million, five hundred twenty-one thousand, two hundred thirteen".