4506821321 has 2 divisors, whose sum is σ = 4506821322. Its totient is φ = 4506821320.

The previous prime is 4506821281. The next prime is 4506821339. The reversal of 4506821321 is 1231286054.

4506821321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4493825296 + 12996025 = 67036^2 + 3605^2 .

It is a cyclic number.

It is not a de Polignac number, because 4506821321 - 2³⁰ = 3433079497 is a prime.

It is a super-2 number, since 2×4506821321² = 40622876838840370082, which contains 22 as substring.

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 (4506821521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2253410660 + 2253410661.

It is an arithmetic number, because the mean of its divisors is an integer number (2253410661).

Almost surely, 2^4506821321 is an apocalyptic number.

It is an amenable number.

4506821321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4506821321 is an equidigital number, since it uses as much as digits as its factorization.

4506821321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 4506821321 is about 67132.8631967980. The cubic root of 4506821321 is about 1651.7974072070.

The spelling of 4506821321 in words is "four billion, five hundred six million, eight hundred twenty-one thousand, three hundred twenty-one".