109281281 has 2 divisors, whose sum is σ = 109281282. Its totient is φ = 109281280.

The previous prime is 109281259. The next prime is 109281371. The reversal of 109281281 is 182182901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80712256 + 28569025 = 8984^2 + 5345^2 .

It is a cyclic number.

It is not a de Polignac number, because 109281281 - 2¹⁸ = 109019137 is a prime.

It is a super-2 number, since 2×109281281² = 23884796754001922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (109281241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54640640 + 54640641.

It is an arithmetic number, because the mean of its divisors is an integer number (54640641).

It is a Proth number, since it is equal to 3335 ⋅ 2¹⁵ + 1 and 3335 < 2¹⁵.

Almost surely, 2^109281281 is an apocalyptic number.

It is an amenable number.

109281281 is a deficient number, since it is larger than the sum of its proper divisors (1).

109281281 is an equidigital number, since it uses as much as digits as its factorization.

109281281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 109281281 is about 10453.7687462465. The cubic root of 109281281 is about 478.0961639009.

The spelling of 109281281 in words is "one hundred nine million, two hundred eighty-one thousand, two hundred eighty-one".