5505542221 has 2 divisors, whose sum is σ = 5505542222. Its totient is φ = 5505542220.

The previous prime is 5505542179. The next prime is 5505542233. The reversal of 5505542221 is 1222455055.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4762380100 + 743162121 = 69010^2 + 27261^2 .

It is a cyclic number.

It is not a de Polignac number, because 5505542221 - 2⁹ = 5505541709 is a prime.

It is a super-2 number, since 2×5505542221² = 60621990294427225682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5505542521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752771110 + 2752771111.

It is an arithmetic number, because the mean of its divisors is an integer number (2752771111).

Almost surely, 2^5505542221 is an apocalyptic number.

It is an amenable number.

5505542221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5505542221 is an equidigital number, since it uses as much as digits as its factorization.

5505542221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 5505542221 is about 74199.3411089344. The cubic root of 5505542221 is about 1765.7668768237.

Adding to 5505542221 its reverse (1222455055), we get a palindrome (6727997276).

The spelling of 5505542221 in words is "five billion, five hundred five million, five hundred forty-two thousand, two hundred twenty-one".