It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a self number, because there is not a number n which added to its sum of digits gives 206722.
It is an unprimeable number.
206722 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2206722 is an apocalyptic number.
206722 is a wasteful number, since it uses less digits than its factorization.
206722 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2564.
The square root of 206722 is about 454.6669110459. Note that the first 3 decimals coincide. The cubic root of 206722 is about 59.1283235888.
The spelling of 206722 in words is "two hundred six thousand, seven hundred twenty-two".