7220817 has 12 divisors (see below), whose sum is σ = 10979280. Its totient is φ = 4560408.

The previous prime is 7220803. The next prime is 7220821. The reversal of 7220817 is 7180227.

7220817 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7220817 - 2¹¹ = 7218769 is a prime.

7220817 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7220867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20943 + ... + 21284.

It is an arithmetic number, because the mean of its divisors is an integer number (914940).

Almost surely, 2^7220817 is an apocalyptic number.

It is an amenable number.

7220817 is a deficient number, since it is larger than the sum of its proper divisors (3758463).

7220817 is a wasteful number, since it uses less digits than its factorization.

7220817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42252 (or 42249 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 7220817 is about 2687.1577921663. The cubic root of 7220817 is about 193.2837959355.

The spelling of 7220817 in words is "seven million, two hundred twenty thousand, eight hundred seventeen".