7223165 has 4 divisors (see below), whose sum is σ = 8667804. Its totient is φ = 5778528.

The previous prime is 7223159. The next prime is 7223171. The reversal of 7223165 is 5613227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5613227 = 19 ⋅295433.

It is an interprime number because it is at equal distance from previous prime (7223159) and next prime (7223171).

It can be written as a sum of positive squares in 2 ways, for example, as 1530169 + 5692996 = 1237^2 + 2386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7223165 is a prime.

It is a super-2 number, since 2×7223165² = 104348225234450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722312 + ... + 722321.

It is an arithmetic number, because the mean of its divisors is an integer number (2166951).

Almost surely, 2^7223165 is an apocalyptic number.

It is an amenable number.

7223165 is a deficient number, since it is larger than the sum of its proper divisors (1444639).

7223165 is a wasteful number, since it uses less digits than its factorization.

7223165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444638.

The product of its digits is 2520, while the sum is 26.

The square root of 7223165 is about 2687.5946494961. The cubic root of 7223165 is about 193.3047437577.

The spelling of 7223165 in words is "seven million, two hundred twenty-three thousand, one hundred sixty-five".