5550550321 has 2 divisors, whose sum is σ = 5550550322. Its totient is φ = 5550550320.

The previous prime is 5550550309. The next prime is 5550550331. The reversal of 5550550321 is 1230550555.

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., 4835255296 + 715295025 = 69536^2 + 26745^2 .

It is a cyclic number.

It is not a de Polignac number, because 5550550321 - 2¹⁹ = 5550026033 is a prime.

It is not a weakly prime, because it can be changed into another prime (5550550331) 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, 2775275160 + 2775275161.

It is an arithmetic number, because the mean of its divisors is an integer number (2775275161).

Almost surely, 2^5550550321 is an apocalyptic number.

It is an amenable number.

5550550321 is a deficient number, since it is larger than the sum of its proper divisors (1).

5550550321 is an equidigital number, since it uses as much as digits as its factorization.

5550550321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18750, while the sum is 31.

The square root of 5550550321 is about 74502.0155499165. The cubic root of 5550550321 is about 1770.5655699525.

The spelling of 5550550321 in words is "five billion, five hundred fifty million, five hundred fifty thousand, three hundred twenty-one".