6722217 has 8 divisors (see below), whose sum is σ = 9958880. Its totient is φ = 4481460.

The previous prime is 6722207. The next prime is 6722239. The reversal of 6722217 is 7122276.

It is not a de Polignac number, because 6722217 - 2⁶ = 6722153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 248971 = 6722217 / (6 + 7 + 2 + 2 + 2 + 1 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6722207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124459 + ... + 124512.

It is an arithmetic number, because the mean of its divisors is an integer number (1244860).

Almost surely, 2^6722217 is an apocalyptic number.

It is an amenable number.

6722217 is a deficient number, since it is larger than the sum of its proper divisors (3236663).

6722217 is a wasteful number, since it uses less digits than its factorization.

6722217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248980 (or 248974 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 6722217 is about 2592.7238572590. The cubic root of 6722217 is about 188.7285091682.

The spelling of 6722217 in words is "six million, seven hundred twenty-two thousand, two hundred seventeen".