2722217 has 4 divisors (see below), whose sum is σ = 2726916. Its totient is φ = 2717520.

The previous prime is 2722207. The next prime is 2722219. The reversal of 2722217 is 7122272.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1590121 + 1132096 = 1261^2 + 1064^2 .

It is a cyclic number.

It is not a de Polignac number, because 2722217 - 2¹⁰ = 2721193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2722192 and 2722201.

It is not an unprimeable number, because it can be changed into a prime (2722219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1334 + ... + 2687.

It is an arithmetic number, because the mean of its divisors is an integer number (681729).

2^2722217 is an apocalyptic number.

It is an amenable number.

2722217 is a deficient number, since it is larger than the sum of its proper divisors (4699).

2722217 is an equidigital number, since it uses as much as digits as its factorization.

2722217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4698.

The product of its digits is 784, while the sum is 23.

The square root of 2722217 is about 1649.9142401955. The cubic root of 2722217 is about 139.6285561843.

Adding to 2722217 its reverse (7122272), we get a palindrome (9844489).

The spelling of 2722217 in words is "two million, seven hundred twenty-two thousand, two hundred seventeen".