5216221817 has 2 divisors, whose sum is σ = 5216221818. Its totient is φ = 5216221816.

The previous prime is 5216221807. The next prime is 5216221847. The reversal of 5216221817 is 7181226125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5043982441 + 172239376 = 71021^2 + 13124^2 .

It is a cyclic number.

It is not a de Polignac number, because 5216221817 - 2³⁰ = 4142479993 is a prime.

It is not a weakly prime, because it can be changed into another prime (5216221807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2608110908 + 2608110909.

It is an arithmetic number, because the mean of its divisors is an integer number (2608110909).

Almost surely, 2^5216221817 is an apocalyptic number.

It is an amenable number.

5216221817 is a deficient number, since it is larger than the sum of its proper divisors (1).

5216221817 is an equidigital number, since it uses as much as digits as its factorization.

5216221817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 35.

The square root of 5216221817 is about 72223.4159881683. The cubic root of 5216221817 is about 1734.2778754808.

The spelling of 5216221817 in words is "five billion, two hundred sixteen million, two hundred twenty-one thousand, eight hundred seventeen".