221310332317 has 2 divisors, whose sum is σ = 221310332318. Its totient is φ = 221310332316.

The previous prime is 221310332273. The next prime is 221310332381. The reversal of 221310332317 is 713233013122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208720145881 + 12590186436 = 456859^2 + 112206^2 .

It is a cyclic number.

It is not a de Polignac number, because 221310332317 - 2¹⁵ = 221310299549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221310932317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110655166158 + 110655166159.

It is an arithmetic number, because the mean of its divisors is an integer number (110655166159).

Almost surely, 2^221310332317 is an apocalyptic number.

It is an amenable number.

221310332317 is a deficient number, since it is larger than the sum of its proper divisors (1).

221310332317 is an equidigital number, since it uses as much as digits as its factorization.

221310332317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

Adding to 221310332317 its reverse (713233013122), we get a palindrome (934543345439).

The spelling of 221310332317 in words is "two hundred twenty-one billion, three hundred ten million, three hundred thirty-two thousand, three hundred seventeen".