5221617691 has 2 divisors, whose sum is σ = 5221617692. Its totient is φ = 5221617690.

The previous prime is 5221617683. The next prime is 5221617727. The reversal of 5221617691 is 1967161225.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5221617691 - 2³ = 5221617683 is a prime.

It is not a weakly prime, because it can be changed into another prime (5221617671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2610808845 + 2610808846.

It is an arithmetic number, because the mean of its divisors is an integer number (2610808846).

Almost surely, 2^5221617691 is an apocalyptic number.

5221617691 is a deficient number, since it is larger than the sum of its proper divisors (1).

5221617691 is an equidigital number, since it uses as much as digits as its factorization.

5221617691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 40.

The square root of 5221617691 is about 72260.7617659820. The cubic root of 5221617691 is about 1734.8756721448.

The spelling of 5221617691 in words is "five billion, two hundred twenty-one million, six hundred seventeen thousand, six hundred ninety-one".