450646002221 has 2 divisors, whose sum is σ = 450646002222. Its totient is φ = 450646002220.

The previous prime is 450646002151. The next prime is 450646002259. The reversal of 450646002221 is 122200646054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 446825402500 + 3820599721 = 668450^2 + 61811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450646002221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450646002721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225323001110 + 225323001111.

It is an arithmetic number, because the mean of its divisors is an integer number (225323001111).

Almost surely, 2^450646002221 is an apocalyptic number.

It is an amenable number.

450646002221 is a deficient number, since it is larger than the sum of its proper divisors (1).

450646002221 is an equidigital number, since it uses as much as digits as its factorization.

450646002221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 450646002221 its reverse (122200646054), we get a palindrome (572846648275).

The spelling of 450646002221 in words is "four hundred fifty billion, six hundred forty-six million, two thousand, two hundred twenty-one".