643250200 has 48 divisors (see below), whose sum is σ = 1560592080. Its totient is φ = 246111360.

The previous prime is 643250197. The next prime is 643250203. The reversal of 643250200 is 2052346.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (643250197) and next prime (643250203).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643250203) 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 11 ways as a sum of consecutive naturals, for example, 65319 + ... + 74518.

It is an arithmetic number, because the mean of its divisors is an integer number (32512335).

Almost surely, 2^643250200 is an apocalyptic number.

It is an amenable number.

643250200 is an abundant number, since it is smaller than the sum of its proper divisors (917341880).

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

643250200 is a wasteful number, since it uses less digits than its factorization.

643250200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139876 (or 139867 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 643250200 is about 25362.3776487931. The cubic root of 643250200 is about 863.2302350347.

The spelling of 643250200 in words is "six hundred forty-three million, two hundred fifty thousand, two hundred".