5505404221 has 2 divisors, whose sum is σ = 5505404222. Its totient is φ = 5505404220.

The previous prime is 5505404209. The next prime is 5505404227. The reversal of 5505404221 is 1224045055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5032341721 + 473062500 = 70939^2 + 21750^2 .

It is a cyclic number.

It is not a de Polignac number, because 5505404221 - 2⁵ = 5505404189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5505404221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5505404227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752702110 + 2752702111.

It is an arithmetic number, because the mean of its divisors is an integer number (2752702111).

Almost surely, 2^5505404221 is an apocalyptic number.

It is an amenable number.

5505404221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5505404221 is an equidigital number, since it uses as much as digits as its factorization.

5505404221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 5505404221 is about 74198.4111757118. The cubic root of 5505404221 is about 1765.7521233350.

Adding to 5505404221 its reverse (1224045055), we get a palindrome (6729449276).

The spelling of 5505404221 in words is "five billion, five hundred five million, four hundred four thousand, two hundred twenty-one".