7228681 has 2 divisors, whose sum is σ = 7228682. Its totient is φ = 7228680.

The previous prime is 7228657. The next prime is 7228691. The reversal of 7228681 is 1868227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6969600 + 259081 = 2640^2 + 509^2 .

It is a cyclic number.

It is not a de Polignac number, because 7228681 - 2¹¹ = 7226633 is a prime.

It is a super-2 number, since 2×7228681² = 104507657999522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7228631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3614340 + 3614341.

It is an arithmetic number, because the mean of its divisors is an integer number (3614341).

Almost surely, 2^7228681 is an apocalyptic number.

It is an amenable number.

7228681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7228681 is an equidigital number, since it uses as much as digits as its factorization.

7228681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 34.

The square root of 7228681 is about 2688.6206500732. The cubic root of 7228681 is about 193.3539372281.

The spelling of 7228681 in words is "seven million, two hundred twenty-eight thousand, six hundred eighty-one".