6722534221 has 24 divisors (see below), whose sum is σ = 7473427200. Its totient is φ = 6041445696.

The previous prime is 6722534141. The next prime is 6722534239. The reversal of 6722534221 is 1224352276.

It is not a de Polignac number, because 6722534221 - 2⁹ = 6722533709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6722534521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1578531 + ... + 1582783.

It is an arithmetic number, because the mean of its divisors is an integer number (311392800).

Almost surely, 2^6722534221 is an apocalyptic number.

It is an amenable number.

6722534221 is a deficient number, since it is larger than the sum of its proper divisors (750892979).

6722534221 is a wasteful number, since it uses less digits than its factorization.

6722534221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525 (or 4512 counting only the distinct ones).

The product of its digits is 40320, while the sum is 34.

The square root of 6722534221 is about 81991.0618360319. The cubic root of 6722534221 is about 1887.3147781698.

Adding to 6722534221 its reverse (1224352276), we get a palindrome (7946886497).

The spelling of 6722534221 in words is "six billion, seven hundred twenty-two million, five hundred thirty-four thousand, two hundred twenty-one".