5281535721313 has 2 divisors, whose sum is σ = 5281535721314. Its totient is φ = 5281535721312.

The previous prime is 5281535721257. The next prime is 5281535721337. The reversal of 5281535721313 is 3131275351825.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5076405535744 + 205130185569 = 2253088^2 + 452913^2 .

It is a cyclic number.

It is not a de Polignac number, because 5281535721313 - 2¹⁷ = 5281535590241 is a prime.

It is not a weakly prime, because it can be changed into another prime (5281535791313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2640767860656 + 2640767860657.

It is an arithmetic number, because the mean of its divisors is an integer number (2640767860657).

Almost surely, 2^{5281535721313} is an apocalyptic number.

It is an amenable number.

5281535721313 is a deficient number, since it is larger than the sum of its proper divisors (1).

5281535721313 is an equidigital number, since it uses as much as digits as its factorization.

5281535721313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 46.

The spelling of 5281535721313 in words is "five trillion, two hundred eighty-one billion, five hundred thirty-five million, seven hundred twenty-one thousand, three hundred thirteen".