281840441 has 2 divisors, whose sum is σ = 281840442. Its totient is φ = 281840440.

The previous prime is 281840423. The next prime is 281840513. The reversal of 281840441 is 144048182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280897600 + 942841 = 16760^2 + 971^2 .

It is a cyclic number.

It is not a de Polignac number, because 281840441 - 2¹⁴ = 281824057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 281840398 and 281840407.

It is not a weakly prime, because it can be changed into another prime (281860441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140920220 + 140920221.

It is an arithmetic number, because the mean of its divisors is an integer number (140920221).

Almost surely, 2^281840441 is an apocalyptic number.

It is an amenable number.

281840441 is a deficient number, since it is larger than the sum of its proper divisors (1).

281840441 is an equidigital number, since it uses as much as digits as its factorization.

281840441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 281840441 is about 16788.1041514520. The cubic root of 281840441 is about 655.6435149501.

The spelling of 281840441 in words is "two hundred eighty-one million, eight hundred forty thousand, four hundred forty-one".