5218108691 has 2 divisors, whose sum is σ = 5218108692. Its totient is φ = 5218108690.

The previous prime is 5218108669. The next prime is 5218108771. The reversal of 5218108691 is 1968018125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5218108691 - 2⁶ = 5218108627 is a prime.

It is a super-2 number, since 2×5218108691² = 54457316622179466962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5218102691) 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, 2609054345 + 2609054346.

It is an arithmetic number, because the mean of its divisors is an integer number (2609054346).

Almost surely, 2^5218108691 is an apocalyptic number.

5218108691 is a deficient number, since it is larger than the sum of its proper divisors (1).

5218108691 is an equidigital number, since it uses as much as digits as its factorization.

5218108691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 41.

The square root of 5218108691 is about 72236.4775650087. The cubic root of 5218108691 is about 1734.4869648340.

The spelling of 5218108691 in words is "five billion, two hundred eighteen million, one hundred eight thousand, six hundred ninety-one".