217305326996 has 6 divisors (see below), whose sum is σ = 380284322250. Its totient is φ = 108652663496.

The previous prime is 217305326971. The next prime is 217305326999. The reversal of 217305326996 is 699623503712.

It can be written as a sum of positive squares in only one way, i.e., 118036222096 + 99269104900 = 343564^2 + 315070^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217305326999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27163165871 + ... + 27163165878.

It is an arithmetic number, because the mean of its divisors is an integer number (63380720375).

Almost surely, 2^217305326996 is an apocalyptic number.

It is an amenable number.

217305326996 is a deficient number, since it is larger than the sum of its proper divisors (162978995254).

217305326996 is a wasteful number, since it uses less digits than its factorization.

217305326996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54326331753 (or 54326331751 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 53.

The spelling of 217305326996 in words is "two hundred seventeen billion, three hundred five million, three hundred twenty-six thousand, nine hundred ninety-six".