281306673233 has 2 divisors, whose sum is σ = 281306673234. Its totient is φ = 281306673232.

The previous prime is 281306673181. The next prime is 281306673247. The reversal of 281306673233 is 332376603182.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162648470209 + 118658203024 = 403297^2 + 344468^2 .

It is a cyclic number.

It is not a de Polignac number, because 281306673233 - 2⁶ = 281306673169 is a prime.

It is not a weakly prime, because it can be changed into another prime (281306673253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140653336616 + 140653336617.

It is an arithmetic number, because the mean of its divisors is an integer number (140653336617).

Almost surely, 2^281306673233 is an apocalyptic number.

It is an amenable number.

281306673233 is a deficient number, since it is larger than the sum of its proper divisors (1).

281306673233 is an equidigital number, since it uses as much as digits as its factorization.

281306673233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 44.

The spelling of 281306673233 in words is "two hundred eighty-one billion, three hundred six million, six hundred seventy-three thousand, two hundred thirty-three".