200181630 has 96 divisors (see below), whose sum is σ = 557020800. Its totient is φ = 45652480.

The previous prime is 200181623. The next prime is 200181643. The reversal of 200181630 is 36181002.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200181597 and 200181606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94321 + ... + 96419.

It is an arithmetic number, because the mean of its divisors is an integer number (5802300).

Almost surely, 2^200181630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200181630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278510400).

200181630 is an abundant number, since it is smaller than the sum of its proper divisors (356839170).

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

200181630 is a wasteful number, since it uses less digits than its factorization.

200181630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2154 (or 2137 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 200181630 is about 14148.5557566841. Note that the first 3 decimals coincide. The cubic root of 200181630 is about 584.9805238603.

The spelling of 200181630 in words is "two hundred million, one hundred eighty-one thousand, six hundred thirty".