2218127281 has 2 divisors, whose sum is σ = 2218127282. Its totient is φ = 2218127280.

The previous prime is 2218127269. The next prime is 2218127293. The reversal of 2218127281 is 1827218122.

It is a balanced prime because it is at equal distance from previous prime (2218127269) and next prime (2218127293).

It can be written as a sum of positive squares in only one way, i.e., 2189397681 + 28729600 = 46791^2 + 5360^2 .

It is a cyclic number.

It is not a de Polignac number, because 2218127281 - 2⁹ = 2218126769 is a prime.

It is a super-2 number, since 2×2218127281² = 9840177269432905922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2218127251) 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, 1109063640 + 1109063641.

It is an arithmetic number, because the mean of its divisors is an integer number (1109063641).

Almost surely, 2^2218127281 is an apocalyptic number.

It is an amenable number.

2218127281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218127281 is an equidigital number, since it uses as much as digits as its factorization.

2218127281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 34.

The square root of 2218127281 is about 47096.9986411024. The cubic root of 2218127281 is about 1304.1538298911.

The spelling of 2218127281 in words is "two billion, two hundred eighteen million, one hundred twenty-seven thousand, two hundred eighty-one".