5421239321 has 2 divisors, whose sum is σ = 5421239322. Its totient is φ = 5421239320.

The previous prime is 5421239281. The next prime is 5421239333. The reversal of 5421239321 is 1239321245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4919479321 + 501760000 = 70139^2 + 22400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5421239321 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 (5421239821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2710619660 + 2710619661.

It is an arithmetic number, because the mean of its divisors is an integer number (2710619661).

Almost surely, 2^5421239321 is an apocalyptic number.

It is an amenable number.

5421239321 is a deficient number, since it is larger than the sum of its proper divisors (1).

5421239321 is an equidigital number, since it uses as much as digits as its factorization.

5421239321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 5421239321 is about 73629.0657349392. The cubic root of 5421239321 is about 1756.7077875931.

The spelling of 5421239321 in words is "five billion, four hundred twenty-one million, two hundred thirty-nine thousand, three hundred twenty-one".