It is a congruent number.
It is an unprimeable number.
Almost surely, 2199221750 is an apocalyptic number.
199221750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 199221750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339852240).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
199221750 is a wasteful number, since it uses less digits than its factorization.
199221750 is an evil number, because the sum of its binary digits is even.
The square root of 199221750 is about 14114.5935116814. The cubic root of 199221750 is about 584.0440226869.
The spelling of 199221750 in words is "one hundred ninety-nine million, two hundred twenty-one thousand, seven hundred fifty".