650070221 has 2 divisors, whose sum is σ = 650070222. Its totient is φ = 650070220.

The previous prime is 650070203. The next prime is 650070241. The reversal of 650070221 is 122070056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 632522500 + 17547721 = 25150^2 + 4189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650070221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650070241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325035110 + 325035111.

It is an arithmetic number, because the mean of its divisors is an integer number (325035111).

Almost surely, 2^650070221 is an apocalyptic number.

It is an amenable number.

650070221 is a deficient number, since it is larger than the sum of its proper divisors (1).

650070221 is an equidigital number, since it uses as much as digits as its factorization.

650070221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 650070221 is about 25496.4746778844. The cubic root of 650070221 is about 866.2702981542.

The spelling of 650070221 in words is "six hundred fifty million, seventy thousand, two hundred twenty-one".