643352022 has 24 divisors (see below), whose sum is σ = 1407734640. Its totient is φ = 212326800.

The previous prime is 643351997. The next prime is 643352057. The reversal of 643352022 is 220253346.

643352022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×643352022³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175122 + ... + 178757.

It is an arithmetic number, because the mean of its divisors is an integer number (58655610).

Almost surely, 2^643352022 is an apocalyptic number.

643352022 is an abundant number, since it is smaller than the sum of its proper divisors (764382618).

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

643352022 is a wasteful number, since it uses less digits than its factorization.

643352022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353988 (or 353985 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 643352022 is about 25364.3849127078. The cubic root of 643352022 is about 863.2757803977.

The spelling of 643352022 in words is "six hundred forty-three million, three hundred fifty-two thousand, twenty-two".