• 200 can be written using four 4's:
200 has 12 divisors (see below), whose sum is σ = 465. Its totient is φ = 80.
The previous prime is 199. The next prime is 211. The reversal of 200 is 2.
It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.
200 is nontrivially palindromic in base 7 and base 9.
It can be written as a sum of positive squares in 2 ways, for example, as 196 + 4 = 14^2 + 2^2 .
It is a sliding number, since 200 = 100 + 100 and 1/100 + 1/100 = 0.0200.
It is an ABA number since it can be written as A⋅BA, here for A=2, B=10.
It is a Harshad number since it is a multiple of its sum of digits (2).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
200 is an undulating number in base 7 and base 9.
It is a plaindrome in base 12 and base 13.
It is a nialpdrome in base 6, base 8, base 10, base 15 and base 16.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (3) of ones.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 38 + ... + 42.
200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 200
200 is an abundant number, since it is smaller than the sum of its proper divisors (265).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
200 is a wasteful number, since it uses less digits than its factorization.
200 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 16 (or 7 counting only the distinct ones).
The product of its (nonzero) digits is 2, while the sum is 2.
The square root of 200 is about 14.1421356237. The cubic root of 200 is about 5.8480354764.
The spelling of 200 in words is "two hundred", and thus it is an aban number and an iban number.
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