6450264221 has 2 divisors, whose sum is σ = 6450264222. Its totient is φ = 6450264220.

The previous prime is 6450264217. The next prime is 6450264251. The reversal of 6450264221 is 1224620546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6081816196 + 368448025 = 77986^2 + 19195^2 .

It is a cyclic number.

It is not a de Polignac number, because 6450264221 - 2² = 6450264217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6450264211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3225132110 + 3225132111.

It is an arithmetic number, because the mean of its divisors is an integer number (3225132111).

Almost surely, 2^6450264221 is an apocalyptic number.

It is an amenable number.

6450264221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6450264221 is an equidigital number, since it uses as much as digits as its factorization.

6450264221 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.

The square root of 6450264221 is about 80313.5369722938. The cubic root of 6450264221 is about 1861.4834026129.

Adding to 6450264221 its reverse (1224620546), we get a palindrome (7674884767).

The spelling of 6450264221 in words is "six billion, four hundred fifty million, two hundred sixty-four thousand, two hundred twenty-one".