5216581 has 2 divisors, whose sum is σ = 5216582. Its totient is φ = 5216580.

The previous prime is 5216573. The next prime is 5216591. The reversal of 5216581 is 1856125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3740356 + 1476225 = 1934^2 + 1215^2 .

It is a cyclic number.

It is not a de Polignac number, because 5216581 - 2³ = 5216573 is a prime.

It is a super-2 number, since 2×5216581² = 54425434659122, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5216521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2608290 + 2608291.

It is an arithmetic number, because the mean of its divisors is an integer number (2608291).

Almost surely, 2^5216581 is an apocalyptic number.

It is an amenable number.

5216581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5216581 is an equidigital number, since it uses as much as digits as its factorization.

5216581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 28.

The square root of 5216581 is about 2283.9835813771. The cubic root of 5216581 is about 173.4317681357.

The spelling of 5216581 in words is "five million, two hundred sixteen thousand, five hundred eighty-one".