208117212700 has 18 divisors (see below), whose sum is σ = 451614351776. Its totient is φ = 83246885040.

The previous prime is 208117212679. The next prime is 208117212731. The reversal of 208117212700 is 7212711802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1040585964 + ... + 1040586163.

Almost surely, 2^208117212700 is an apocalyptic number.

208117212700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208117212700 is an abundant number, since it is smaller than the sum of its proper divisors (243497139076).

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

208117212700 is a wasteful number, since it uses less digits than its factorization.

208117212700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081172141 (or 2081172134 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 31.

The spelling of 208117212700 in words is "two hundred eight billion, one hundred seventeen million, two hundred twelve thousand, seven hundred".