5553521321 has 2 divisors, whose sum is σ = 5553521322. Its totient is φ = 5553521320.

The previous prime is 5553521293. The next prime is 5553521339. The reversal of 5553521321 is 1231253555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3028961296 + 2524560025 = 55036^2 + 50245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5553521321 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 (5553521341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2776760660 + 2776760661.

It is an arithmetic number, because the mean of its divisors is an integer number (2776760661).

Almost surely, 2^5553521321 is an apocalyptic number.

It is an amenable number.

5553521321 is a deficient number, since it is larger than the sum of its proper divisors (1).

5553521321 is an equidigital number, since it uses as much as digits as its factorization.

5553521321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22500, while the sum is 32.

The square root of 5553521321 is about 74521.9519403511. The cubic root of 5553521321 is about 1770.8814192364.

Adding to 5553521321 its reverse (1231253555), we get a palindrome (6784774876).

The spelling of 5553521321 in words is "five billion, five hundred fifty-three million, five hundred twenty-one thousand, three hundred twenty-one".