213543805193 has 2 divisors, whose sum is σ = 213543805194. Its totient is φ = 213543805192.

The previous prime is 213543805171. The next prime is 213543805231. The reversal of 213543805193 is 391508345312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147611945209 + 65931859984 = 384203^2 + 256772^2 .

It is a cyclic number.

It is not a de Polignac number, because 213543805193 - 2⁸ = 213543804937 is a prime.

It is not a weakly prime, because it can be changed into another prime (213543805793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106771902596 + 106771902597.

It is an arithmetic number, because the mean of its divisors is an integer number (106771902597).

Almost surely, 2^213543805193 is an apocalyptic number.

It is an amenable number.

213543805193 is a deficient number, since it is larger than the sum of its proper divisors (1).

213543805193 is an equidigital number, since it uses as much as digits as its factorization.

213543805193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 213543805193 in words is "two hundred thirteen billion, five hundred forty-three million, eight hundred five thousand, one hundred ninety-three".