217803465413 has 2 divisors, whose sum is σ = 217803465414. Its totient is φ = 217803465412.

The previous prime is 217803465361. The next prime is 217803465443. The reversal of 217803465413 is 314564308712.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217251074404 + 552391009 = 466102^2 + 23503^2 .

It is a cyclic number.

It is not a de Polignac number, because 217803465413 - 2⁸ = 217803465157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217803465443) 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, 108901732706 + 108901732707.

It is an arithmetic number, because the mean of its divisors is an integer number (108901732707).

Almost surely, 2^217803465413 is an apocalyptic number.

It is an amenable number.

217803465413 is a deficient number, since it is larger than the sum of its proper divisors (1).

217803465413 is an equidigital number, since it uses as much as digits as its factorization.

217803465413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 217803465413 in words is "two hundred seventeen billion, eight hundred three million, four hundred sixty-five thousand, four hundred thirteen".