6320221 has 4 divisors (see below), whose sum is σ = 6366492. Its totient is φ = 6273952.

The previous prime is 6320219. The next prime is 6320227. The reversal of 6320221 is 1220236.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3724900 + 2595321 = 1930^2 + 1611^2 .

It is a cyclic number.

It is not a de Polignac number, because 6320221 - 2¹ = 6320219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6320195 and 6320204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6320227) 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, 22930 + ... + 23203.

It is an arithmetic number, because the mean of its divisors is an integer number (1591623).

Almost surely, 2^6320221 is an apocalyptic number.

It is an amenable number.

6320221 is a deficient number, since it is larger than the sum of its proper divisors (46271).

6320221 is a wasteful number, since it uses less digits than its factorization.

6320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46270.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 6320221 is about 2514.0049721510. The cubic root of 6320221 is about 184.8888643437. Note that the first 4 decimals are identical.

Adding to 6320221 its reverse (1220236), we get a palindrome (7540457).

The spelling of 6320221 in words is "six million, three hundred twenty thousand, two hundred twenty-one".