643250201 has 8 divisors (see below), whose sum is σ = 718047264. Its totient is φ = 571173120.

The previous prime is 643250197. The next prime is 643250203. The reversal of 643250201 is 102052346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 643250201 - 2² = 643250197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (643250203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679496 + ... + 680441.

It is an arithmetic number, because the mean of its divisors is an integer number (89755908).

Almost surely, 2^643250201 is an apocalyptic number.

It is an amenable number.

643250201 is a deficient number, since it is larger than the sum of its proper divisors (74797063).

643250201 is a wasteful number, since it uses less digits than its factorization.

643250201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359991.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 643250201 is about 25362.3776685073. The cubic root of 643250201 is about 863.2302354820.

The spelling of 643250201 in words is "six hundred forty-three million, two hundred fifty thousand, two hundred one".