13213934557 has 2 divisors, whose sum is σ = 13213934558. Its totient is φ = 13213934556.

The previous prime is 13213934533. The next prime is 13213934597. The reversal of 13213934557 is 75543931231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12980272761 + 233661796 = 113931^2 + 15286^2 .

It is a cyclic number.

It is not a de Polignac number, because 13213934557 - 2¹¹ = 13213932509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13213934527) 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, 6606967278 + 6606967279.

It is an arithmetic number, because the mean of its divisors is an integer number (6606967279).

Almost surely, 2^13213934557 is an apocalyptic number.

It is an amenable number.

13213934557 is a deficient number, since it is larger than the sum of its proper divisors (1).

13213934557 is an equidigital number, since it uses as much as digits as its factorization.

13213934557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 43.

The spelling of 13213934557 in words is "thirteen billion, two hundred thirteen million, nine hundred thirty-four thousand, five hundred fifty-seven".