201643212 has 48 divisors (see below), whose sum is σ = 480090240. Its totient is φ = 65859072.

The previous prime is 201643199. The next prime is 201643213. The reversal of 201643212 is 212346102.

It is not an unprimeable number, because it can be changed into a prime (201643213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123739 + ... + 125357.

It is an arithmetic number, because the mean of its divisors is an integer number (10001880).

Almost surely, 2^201643212 is an apocalyptic number.

It is an amenable number.

201643212 is an abundant number, since it is smaller than the sum of its proper divisors (278447028).

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

201643212 is a wasteful number, since it uses less digits than its factorization.

201643212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830 (or 1828 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 201643212 is about 14200.1130981412. The cubic root of 201643212 is about 586.4007749699.

Adding to 201643212 its reverse (212346102), we get a palindrome (413989314).

The spelling of 201643212 in words is "two hundred one million, six hundred forty-three thousand, two hundred twelve".