281438219 has 2 divisors, whose sum is σ = 281438220. Its totient is φ = 281438218.

The previous prime is 281438207. The next prime is 281438221. The reversal of 281438219 is 912834182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 281438219 - 2¹⁶ = 281372683 is a prime.

It is a super-2 number, since 2×281438219² = 158414942227783922, which contains 22 as substring.

Together with 281438221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (281438239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140719109 + 140719110.

It is an arithmetic number, because the mean of its divisors is an integer number (140719110).

Almost surely, 2^281438219 is an apocalyptic number.

281438219 is a deficient number, since it is larger than the sum of its proper divisors (1).

281438219 is an equidigital number, since it uses as much as digits as its factorization.

281438219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The square root of 281438219 is about 16776.1204990904. The cubic root of 281438219 is about 655.3314710200.

The spelling of 281438219 in words is "two hundred eighty-one million, four hundred thirty-eight thousand, two hundred nineteen".