6219218281 has 2 divisors, whose sum is σ = 6219218282. Its totient is φ = 6219218280.

The previous prime is 6219218279. The next prime is 6219218309. The reversal of 6219218281 is 1828129126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3911376681 + 2307841600 = 62541^2 + 48040^2 .

It is a cyclic number.

It is not a de Polignac number, because 6219218281 - 2¹ = 6219218279 is a prime.

It is a super-2 number, since 2×6219218281² = 77357352053449189922, which contains 22 as substring.

Together with 6219218279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6219218221) 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, 3109609140 + 3109609141.

It is an arithmetic number, because the mean of its divisors is an integer number (3109609141).

Almost surely, 2^6219218281 is an apocalyptic number.

It is an amenable number.

6219218281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6219218281 is an equidigital number, since it uses as much as digits as its factorization.

6219218281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 40.

The square root of 6219218281 is about 78862.0205231897. The cubic root of 6219218281 is about 1838.9867492500.

The spelling of 6219218281 in words is "six billion, two hundred nineteen million, two hundred eighteen thousand, two hundred eighty-one".