556050221 has 2 divisors, whose sum is σ = 556050222. Its totient is φ = 556050220.

The previous prime is 556050133. The next prime is 556050223. The reversal of 556050221 is 122050655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338044996 + 218005225 = 18386^2 + 14765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556050221 is a prime.

Together with 556050223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556050223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278025110 + 278025111.

It is an arithmetic number, because the mean of its divisors is an integer number (278025111).

Almost surely, 2^556050221 is an apocalyptic number.

It is an amenable number.

556050221 is a deficient number, since it is larger than the sum of its proper divisors (1).

556050221 is an equidigital number, since it uses as much as digits as its factorization.

556050221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 556050221 is about 23580.7171434628. The cubic root of 556050221 is about 822.3146090416.

The spelling of 556050221 in words is "five hundred fifty-six million, fifty thousand, two hundred twenty-one".