6340221 has 24 divisors (see below), whose sum is σ = 9692160. Its totient is φ = 4096008.

The previous prime is 6340219. The next prime is 6340237. The reversal of 6340221 is 1220436.

It is a happy number.

It is not a de Polignac number, because 6340221 - 2¹ = 6340219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6340194 and 6340203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6340261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49860 + ... + 49986.

It is an arithmetic number, because the mean of its divisors is an integer number (403840).

Almost surely, 2^6340221 is an apocalyptic number.

It is an amenable number.

6340221 is a deficient number, since it is larger than the sum of its proper divisors (3351939).

6340221 is a wasteful number, since it uses less digits than its factorization.

6340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 6340221 is about 2517.9795471767. The cubic root of 6340221 is about 185.0836826187.

Adding to 6340221 its reverse (1220436), we get a palindrome (7560657).

It can be divided in two parts, 6340 and 221, that added together give a 8-th power (6561 = 3⁸).

The spelling of 6340221 in words is "six million, three hundred forty thousand, two hundred twenty-one".