7229281 has 2 divisors, whose sum is σ = 7229282. Its totient is φ = 7229280.

The previous prime is 7229279. The next prime is 7229297. The reversal of 7229281 is 1829227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5382400 + 1846881 = 2320^2 + 1359^2 .

It is an emirp because it is prime and its reverse (1829227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7229281 - 2¹ = 7229279 is a prime.

It is a super-2 number, since 2×7229281² = 104525007553922, which contains 22 as substring.

Together with 7229279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7229581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3614640 + 3614641.

It is an arithmetic number, because the mean of its divisors is an integer number (3614641).

Almost surely, 2^7229281 is an apocalyptic number.

It is an amenable number.

7229281 is a deficient number, since it is larger than the sum of its proper divisors (1).

7229281 is an equidigital number, since it uses as much as digits as its factorization.

7229281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 7229281 is about 2688.7322291370. The cubic root of 7229281 is about 193.3592867127.

The spelling of 7229281 in words is "seven million, two hundred twenty-nine thousand, two hundred eighty-one".