217002208856 has 16 divisors (see below), whose sum is σ = 407067456840. Its totient is φ = 108450887040.

The previous prime is 217002208817. The next prime is 217002208909. The reversal of 217002208856 is 658802200712.

217002208856 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6258806 + ... + 6293381.

Almost surely, 2^217002208856 is an apocalyptic number.

It is an amenable number.

217002208856 is a deficient number, since it is larger than the sum of its proper divisors (190065247984).

217002208856 is a wasteful number, since it uses less digits than its factorization.

217002208856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12554354 (or 12554350 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 217002208856 in words is "two hundred seventeen billion, two million, two hundred eight thousand, eight hundred fifty-six".