6502221 has 16 divisors (see below), whose sum is σ = 10509120. Its totient is φ = 3940560.

The previous prime is 6502207. The next prime is 6502229. The reversal of 6502221 is 1222056.

It is not a de Polignac number, because 6502221 - 2¹⁴ = 6485837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6502194 and 6502203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6502229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10650 + ... + 11243.

It is an arithmetic number, because the mean of its divisors is an integer number (656820).

Almost surely, 2^6502221 is an apocalyptic number.

It is an amenable number.

6502221 is a deficient number, since it is larger than the sum of its proper divisors (4006899).

6502221 is a wasteful number, since it uses less digits than its factorization.

6502221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21913 (or 21907 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 6502221 is about 2549.9452935308. The cubic root of 6502221 is about 186.6468115928.

Adding to 6502221 its reverse (1222056), we get a palindrome (7724277).

The spelling of 6502221 in words is "six million, five hundred two thousand, two hundred twenty-one".