643372212 has 48 divisors (see below), whose sum is σ = 1716930432. Its totient is φ = 183684480.

The previous prime is 643372207. The next prime is 643372217. The reversal of 643372212 is 212273346.

It is an interprime number because it is at equal distance from previous prime (643372207) and next prime (643372217).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 643372212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643372217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184162 + ... + 187622.

It is an arithmetic number, because the mean of its divisors is an integer number (35769384).

Almost surely, 2^643372212 is an apocalyptic number.

It is an amenable number.

643372212 is an abundant number, since it is smaller than the sum of its proper divisors (1073558220).

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

643372212 is a wasteful number, since it uses less digits than its factorization.

643372212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5688 (or 5686 counting only the distinct ones).

The product of its digits is 12096, while the sum is 30.

The square root of 643372212 is about 25364.7829085920. The cubic root of 643372212 is about 863.2848108896.

The spelling of 643372212 in words is "six hundred forty-three million, three hundred seventy-two thousand, two hundred twelve".