5221321 has 4 divisors (see below), whose sum is σ = 5967232. Its totient is φ = 4475412.

The previous prime is 5221319. The next prime is 5221327. The reversal of 5221321 is 1231225.

5221321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5221321 - 2¹ = 5221319 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5221295 and 5221304.

It is not an unprimeable number, because it can be changed into a prime (5221327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372945 + ... + 372958.

It is an arithmetic number, because the mean of its divisors is an integer number (1491808).

Almost surely, 2^5221321 is an apocalyptic number.

It is an amenable number.

5221321 is a deficient number, since it is larger than the sum of its proper divisors (745911).

5221321 is an equidigital number, since it uses as much as digits as its factorization.

5221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745910.

The product of its digits is 120, while the sum is 16.

The square root of 5221321 is about 2285.0210064680. The cubic root of 5221321 is about 173.4842813123.

Adding to 5221321 its reverse (1231225), we get a palindrome (6452546).

The spelling of 5221321 in words is "five million, two hundred twenty-one thousand, three hundred twenty-one".