217007205211206 has 24 divisors (see below), whose sum is σ = 470902312099440. Its totient is φ = 72224960587056.

The previous prime is 217007205211189. The next prime is 217007205211213. The reversal of 217007205211206 is 602112502700712.

217007205211206 is a `hidden beast` number, since 2 + 1 + 7 + 0 + 0 + 7 + 2 + 0 + 521 + 120 + 6 = 666.

It is a super-2 number, since 2×217007205211206² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9231194866 + ... + 9231218373.

It is an arithmetic number, because the mean of its divisors is an integer number (19620929670810).

Almost surely, 2^{217007205211206} is an apocalyptic number.

217007205211206 is an abundant number, since it is smaller than the sum of its proper divisors (253895106888234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217007205211206 is a wasteful number, since it uses less digits than its factorization.

217007205211206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18462413900 (or 18462413897 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

Adding to 217007205211206 its reverse (602112502700712), we get a palindrome (819119707911918).

The spelling of 217007205211206 in words is "two hundred seventeen trillion, seven billion, two hundred five million, two hundred eleven thousand, two hundred six".