5211331555513 has 2 divisors, whose sum is σ = 5211331555514. Its totient is φ = 5211331555512.

The previous prime is 5211331555501. The next prime is 5211331555517. The reversal of 5211331555513 is 3155551331125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4596405829929 + 614925725584 = 2143923^2 + 784172^2 .

It is a cyclic number.

It is not a de Polignac number, because 5211331555513 - 2²⁵ = 5211298001081 is a prime.

It is not a weakly prime, because it can be changed into another prime (5211331555517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2605665777756 + 2605665777757.

It is an arithmetic number, because the mean of its divisors is an integer number (2605665777757).

Almost surely, 2^{5211331555513} is an apocalyptic number.

It is an amenable number.

5211331555513 is a deficient number, since it is larger than the sum of its proper divisors (1).

5211331555513 is an equidigital number, since it uses as much as digits as its factorization.

5211331555513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168750, while the sum is 40.

Adding to 5211331555513 its reverse (3155551331125), we get a palindrome (8366882886638).

The spelling of 5211331555513 in words is "five trillion, two hundred eleven billion, three hundred thirty-one million, five hundred fifty-five thousand, five hundred thirteen".