646216201 has 8 divisors (see below), whose sum is σ = 686470400. Its totient is φ = 606586320.

The previous prime is 646216199. The next prime is 646216217. The reversal of 646216201 is 102612646.

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 646216201 - 2¹ = 646216199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 646216201.

It is not an unprimeable number, because it can be changed into a prime (646216001) 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, 153945 + ... + 158086.

It is an arithmetic number, because the mean of its divisors is an integer number (85808800).

Almost surely, 2^646216201 is an apocalyptic number.

It is an amenable number.

646216201 is a deficient number, since it is larger than the sum of its proper divisors (40254199).

646216201 is a wasteful number, since it uses less digits than its factorization.

646216201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312159.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 646216201 is about 25420.7828557659. The cubic root of 646216201 is about 864.5549743968.

Adding to 646216201 its reverse (102612646), we get a palindrome (748828847).

The spelling of 646216201 in words is "six hundred forty-six million, two hundred sixteen thousand, two hundred one".