281279489221 has 2 divisors, whose sum is σ = 281279489222. Its totient is φ = 281279489220.

The previous prime is 281279489191. The next prime is 281279489251. The reversal of 281279489221 is 122984972182.

It is a balanced prime because it is at equal distance from previous prime (281279489191) and next prime (281279489251).

It can be written as a sum of positive squares in only one way, i.e., 277333890625 + 3945598596 = 526625^2 + 62814^2 .

It is a cyclic number.

It is not a de Polignac number, because 281279489221 - 2⁵ = 281279489189 is a prime.

It is a super-3 number, since 3×281279489221³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281279489251) 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, 140639744610 + 140639744611.

It is an arithmetic number, because the mean of its divisors is an integer number (140639744611).

Almost surely, 2^281279489221 is an apocalyptic number.

It is an amenable number.

281279489221 is a deficient number, since it is larger than the sum of its proper divisors (1).

281279489221 is an equidigital number, since it uses as much as digits as its factorization.

281279489221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 55.

The spelling of 281279489221 in words is "two hundred eighty-one billion, two hundred seventy-nine million, four hundred eighty-nine thousand, two hundred twenty-one".