555404054221 has 2 divisors, whose sum is σ = 555404054222. Its totient is φ = 555404054220.

The previous prime is 555404054209. The next prime is 555404054243. The reversal of 555404054221 is 122450404555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 425252668996 + 130151385225 = 652114^2 + 360765^2 .

It is a cyclic number.

It is not a de Polignac number, because 555404054221 - 2¹⁷ = 555403923149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555404054281) 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, 277702027110 + 277702027111.

It is an arithmetic number, because the mean of its divisors is an integer number (277702027111).

Almost surely, 2^555404054221 is an apocalyptic number.

It is an amenable number.

555404054221 is a deficient number, since it is larger than the sum of its proper divisors (1).

555404054221 is an equidigital number, since it uses as much as digits as its factorization.

555404054221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160000, while the sum is 37.

Adding to 555404054221 its reverse (122450404555), we get a palindrome (677854458776).

The spelling of 555404054221 in words is "five hundred fifty-five billion, four hundred four million, fifty-four thousand, two hundred twenty-one".