11505715213 has 2 divisors, whose sum is σ = 11505715214. Its totient is φ = 11505715212.

The previous prime is 11505715163. The next prime is 11505715261. The reversal of 11505715213 is 31251750511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8851610889 + 2654104324 = 94083^2 + 51518^2 .

It is a cyclic number.

It is not a de Polignac number, because 11505715213 - 2²⁹ = 10968844301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11505715283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5752857606 + 5752857607.

It is an arithmetic number, because the mean of its divisors is an integer number (5752857607).

Almost surely, 2^11505715213 is an apocalyptic number.

It is an amenable number.

11505715213 is a deficient number, since it is larger than the sum of its proper divisors (1).

11505715213 is an equidigital number, since it uses as much as digits as its factorization.

11505715213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5250, while the sum is 31.

The spelling of 11505715213 in words is "eleven billion, five hundred five million, seven hundred fifteen thousand, two hundred thirteen".