554612221 has 2 divisors, whose sum is σ = 554612222. Its totient is φ = 554612220.

The previous prime is 554612197. The next prime is 554612231. The reversal of 554612221 is 122216455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314672121 + 239940100 = 17739^2 + 15490^2 .

It is a cyclic number.

It is not a de Polignac number, because 554612221 - 2¹⁵ = 554579453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 554612221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554612231) 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, 277306110 + 277306111.

It is an arithmetic number, because the mean of its divisors is an integer number (277306111).

Almost surely, 2^554612221 is an apocalyptic number.

It is an amenable number.

554612221 is a deficient number, since it is larger than the sum of its proper divisors (1).

554612221 is an equidigital number, since it uses as much as digits as its factorization.

554612221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 28.

The square root of 554612221 is about 23550.2063897538. The cubic root of 554612221 is about 821.6051352246.

Adding to 554612221 its reverse (122216455), we get a palindrome (676828676).

The spelling of 554612221 in words is "five hundred fifty-four million, six hundred twelve thousand, two hundred twenty-one".