5216681 has 2 divisors, whose sum is σ = 5216682. Its totient is φ = 5216680.

The previous prime is 5216663. The next prime is 5216683. The reversal of 5216681 is 1866125.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5216656 + 25 = 2284^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 5216681 - 2¹⁴ = 5200297 is a prime.

It is a super-2 number, since 2×5216681² = 54427521311522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 5216683, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5216683) 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, 2608340 + 2608341.

It is an arithmetic number, because the mean of its divisors is an integer number (2608341).

Almost surely, 2^5216681 is an apocalyptic number.

It is an amenable number.

5216681 is a deficient number, since it is larger than the sum of its proper divisors (1).

5216681 is an equidigital number, since it uses as much as digits as its factorization.

5216681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 5216681 is about 2284.0054728481. The cubic root of 5216681 is about 173.4328763370.

The spelling of 5216681 in words is "five million, two hundred sixteen thousand, six hundred eighty-one".