5509030721 has 2 divisors, whose sum is σ = 5509030722. Its totient is φ = 5509030720.

The previous prime is 5509030691. The next prime is 5509030741. The reversal of 5509030721 is 1270309055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3765049600 + 1743981121 = 61360^2 + 41761^2 .

It is a cyclic number.

It is not a de Polignac number, because 5509030721 - 2²² = 5504836417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5509030741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2754515360 + 2754515361.

It is an arithmetic number, because the mean of its divisors is an integer number (2754515361).

Almost surely, 2^5509030721 is an apocalyptic number.

It is an amenable number.

5509030721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5509030721 is an equidigital number, since it uses as much as digits as its factorization.

5509030721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 5509030721 is about 74222.8450074504. The cubic root of 5509030721 is about 1766.1397481912.

Adding to 5509030721 its reverse (1270309055), we get a palindrome (6779339776).

The spelling of 5509030721 in words is "five billion, five hundred nine million, thirty thousand, seven hundred twenty-one".