554205221 has 2 divisors, whose sum is σ = 554205222. Its totient is φ = 554205220.

The previous prime is 554205181. The next prime is 554205299. The reversal of 554205221 is 122502455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 404412100 + 149793121 = 20110^2 + 12239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-554205221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554205121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277102610 + 277102611.

It is an arithmetic number, because the mean of its divisors is an integer number (277102611).

Almost surely, 2^554205221 is an apocalyptic number.

It is an amenable number.

554205221 is a deficient number, since it is larger than the sum of its proper divisors (1).

554205221 is an equidigital number, since it uses as much as digits as its factorization.

554205221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 554205221 is about 23541.5636906302. The cubic root of 554205221 is about 821.4041088086.

Adding to 554205221 its reverse (122502455), we get a palindrome (676707676).

The spelling of 554205221 in words is "five hundred fifty-four million, two hundred five thousand, two hundred twenty-one".