643233230 has 16 divisors (see below), whose sum is σ = 1158197184. Its totient is φ = 257209440.

The previous prime is 643233223. The next prime is 643233251. The reversal of 643233230 is 32332346.

It is a self number, because there is not a number n which added to its sum of digits gives 643233230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28715 + ... + 45945.

It is an arithmetic number, because the mean of its divisors is an integer number (72387324).

Almost surely, 2^643233230 is an apocalyptic number.

643233230 is a deficient number, since it is larger than the sum of its proper divisors (514963954).

643233230 is a wasteful number, since it uses less digits than its factorization.

643233230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20971.

The product of its (nonzero) digits is 7776, while the sum is 26.

The square root of 643233230 is about 25362.0430959337. The cubic root of 643233230 is about 863.2226438227. Note that the first 3 decimals are identical.

Adding to 643233230 its reverse (32332346), we get a palindrome (675565576).

The spelling of 643233230 in words is "six hundred forty-three million, two hundred thirty-three thousand, two hundred thirty".