2015801905213 has 2 divisors, whose sum is σ = 2015801905214. Its totient is φ = 2015801905212.

The previous prime is 2015801905189. The next prime is 2015801905321. The reversal of 2015801905213 is 3125091085102.

Together with next prime (2015801905321) 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., 2002261790169 + 13540115044 = 1415013^2 + 116362^2 .

It is a cyclic number.

It is not a de Polignac number, because 2015801905213 - 2²⁵ = 2015768350781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2015801906213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007900952606 + 1007900952607.

It is an arithmetic number, because the mean of its divisors is an integer number (1007900952607).

Almost surely, 2^{2015801905213} is an apocalyptic number.

It is an amenable number.

2015801905213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015801905213 is an equidigital number, since it uses as much as digits as its factorization.

2015801905213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 37.

The spelling of 2015801905213 in words is "two trillion, fifteen billion, eight hundred one million, nine hundred five thousand, two hundred thirteen".