6225200221 has 2 divisors, whose sum is σ = 6225200222. Its totient is φ = 6225200220.

The previous prime is 6225200213. The next prime is 6225200297. The reversal of 6225200221 is 1220025226.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5070152025 + 1155048196 = 71205^2 + 33986^2 .

It is a cyclic number.

It is not a de Polignac number, because 6225200221 - 2³ = 6225200213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6225200192 and 6225200201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6225200521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3112600110 + 3112600111.

It is an arithmetic number, because the mean of its divisors is an integer number (3112600111).

Almost surely, 2^6225200221 is an apocalyptic number.

It is an amenable number.

6225200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6225200221 is an equidigital number, since it uses as much as digits as its factorization.

6225200221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 6225200221 is about 78899.9380291265. The cubic root of 6225200221 is about 1839.5761686261.

Adding to 6225200221 its reverse (1220025226), we get a palindrome (7445225447).

The spelling of 6225200221 in words is "six billion, two hundred twenty-five million, two hundred thousand, two hundred twenty-one".