650320221 has 4 divisors (see below), whose sum is σ = 867093632. Its totient is φ = 433546812.

The previous prime is 650320199. The next prime is 650320283. The reversal of 650320221 is 122023056.

650320221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 650320221 - 2⁷ = 650320093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650320421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108386701 + ... + 108386706.

It is an arithmetic number, because the mean of its divisors is an integer number (216773408).

Almost surely, 2^650320221 is an apocalyptic number.

It is an amenable number.

650320221 is a deficient number, since it is larger than the sum of its proper divisors (216773411).

650320221 is a wasteful number, since it uses less digits than its factorization.

650320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216773410.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 650320221 is about 25501.3768451823. The cubic root of 650320221 is about 866.3813322196.

Adding to 650320221 its reverse (122023056), we get a palindrome (772343277).

The spelling of 650320221 in words is "six hundred fifty million, three hundred twenty thousand, two hundred twenty-one".