13521225313237 has 2 divisors, whose sum is σ = 13521225313238. Its totient is φ = 13521225313236.

The previous prime is 13521225313231. The next prime is 13521225313259. The reversal of 13521225313237 is 73231352212531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7690782447076 + 5830442866161 = 2773226^2 + 2414631^2 .

It is a cyclic number.

It is not a de Polignac number, because 13521225313237 - 2³⁵ = 13486865574869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13521225313237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13521225313231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760612656618 + 6760612656619.

It is an arithmetic number, because the mean of its divisors is an integer number (6760612656619).

Almost surely, 2^{13521225313237} is an apocalyptic number.

It is an amenable number.

13521225313237 is a deficient number, since it is larger than the sum of its proper divisors (1).

13521225313237 is an equidigital number, since it uses as much as digits as its factorization.

13521225313237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 40.

Adding to 13521225313237 its reverse (73231352212531), we get a palindrome (86752577525768).

The spelling of 13521225313237 in words is "thirteen trillion, five hundred twenty-one billion, two hundred twenty-five million, three hundred thirteen thousand, two hundred thirty-seven".