650568221 has 2 divisors, whose sum is σ = 650568222. Its totient is φ = 650568220.

The previous prime is 650568187. The next prime is 650568251. The reversal of 650568221 is 122865056.

650568221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 600936196 + 49632025 = 24514^2 + 7045^2 .

It is a cyclic number.

It is not a de Polignac number, because 650568221 - 2⁶ = 650568157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650568251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325284110 + 325284111.

It is an arithmetic number, because the mean of its divisors is an integer number (325284111).

Almost surely, 2^650568221 is an apocalyptic number.

It is an amenable number.

650568221 is a deficient number, since it is larger than the sum of its proper divisors (1).

650568221 is an equidigital number, since it uses as much as digits as its factorization.

650568221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 650568221 is about 25506.2388642465. The cubic root of 650568221 is about 866.4914499004.

The spelling of 650568221 in words is "six hundred fifty million, five hundred sixty-eight thousand, two hundred twenty-one".