7228517 has 2 divisors, whose sum is σ = 7228518. Its totient is φ = 7228516.

The previous prime is 7228499. The next prime is 7228523. The reversal of 7228517 is 7158227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6964321 + 264196 = 2639^2 + 514^2 .

It is an emirp because it is prime and its reverse (7158227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7228517 - 2²⁰ = 6179941 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7228547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3614258 + 3614259.

It is an arithmetic number, because the mean of its divisors is an integer number (3614259).

Almost surely, 2^7228517 is an apocalyptic number.

It is an amenable number.

7228517 is a deficient number, since it is larger than the sum of its proper divisors (1).

7228517 is an equidigital number, since it uses as much as digits as its factorization.

7228517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7840, while the sum is 32.

The square root of 7228517 is about 2688.5901509899. The cubic root of 7228517 is about 193.3524749841.

The spelling of 7228517 in words is "seven million, two hundred twenty-eight thousand, five hundred seventeen".