643341212 has 6 divisors (see below), whose sum is σ = 1125847128. Its totient is φ = 321670604.

The previous prime is 643341203. The next prime is 643341221. The reversal of 643341212 is 212143346.

643341212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (643341203) and next prime (643341221).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80417648 + ... + 80417655.

It is an arithmetic number, because the mean of its divisors is an integer number (187641188).

Almost surely, 2^643341212 is an apocalyptic number.

It is an amenable number.

643341212 is a deficient number, since it is larger than the sum of its proper divisors (482505916).

643341212 is a wasteful number, since it uses less digits than its factorization.

643341212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160835307 (or 160835305 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 643341212 is about 25364.1718177432. The cubic root of 643341212 is about 863.2709452721.

Adding to 643341212 its reverse (212143346), we get a palindrome (855484558).

The spelling of 643341212 in words is "six hundred forty-three million, three hundred forty-one thousand, two hundred twelve".