5181217 has 2 divisors, whose sum is σ = 5181218. Its totient is φ = 5181216.

The previous prime is 5181191. The next prime is 5181223. The reversal of 5181217 is 7121815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4822416 + 358801 = 2196^2 + 599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5181217 is a prime.

5181217 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 5181191 and 5181200.

It is not a weakly prime, because it can be changed into another prime (5181287) 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, 2590608 + 2590609.

It is an arithmetic number, because the mean of its divisors is an integer number (2590609).

Almost surely, 2^5181217 is an apocalyptic number.

It is an amenable number.

5181217 is a deficient number, since it is larger than the sum of its proper divisors (1).

5181217 is an equidigital number, since it uses as much as digits as its factorization.

5181217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560, while the sum is 25.

The square root of 5181217 is about 2276.2286791972. The cubic root of 5181217 is about 173.0389723642.

The spelling of 5181217 in words is "five million, one hundred eighty-one thousand, two hundred seventeen".