217230529693 has 2 divisors, whose sum is σ = 217230529694. Its totient is φ = 217230529692.

The previous prime is 217230529673. The next prime is 217230529721. The reversal of 217230529693 is 396925032712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173041024324 + 44189505369 = 415982^2 + 210213^2 .

It is a cyclic number.

It is not a de Polignac number, because 217230529693 - 2²⁹ = 216693658781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217230529613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108615264846 + 108615264847.

It is an arithmetic number, because the mean of its divisors is an integer number (108615264847).

Almost surely, 2^217230529693 is an apocalyptic number.

It is an amenable number.

217230529693 is a deficient number, since it is larger than the sum of its proper divisors (1).

217230529693 is an equidigital number, since it uses as much as digits as its factorization.

217230529693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The spelling of 217230529693 in words is "two hundred seventeen billion, two hundred thirty million, five hundred twenty-nine thousand, six hundred ninety-three".