281833 has 2 divisors, whose sum is σ = 281834. Its totient is φ = 281832.

The previous prime is 281807. The next prime is 281837. The reversal of 281833 is 338182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222784 + 59049 = 472^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 281833 - 2⁹ = 281321 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 281798 and 281807.

It is not a weakly prime, because it can be changed into another prime (281837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140916 + 140917.

It is an arithmetic number, because the mean of its divisors is an integer number (140917).

2²⁸¹⁸³³ is an apocalyptic number.

It is an amenable number.

281833 is a deficient number, since it is larger than the sum of its proper divisors (1).

281833 is an equidigital number, since it uses as much as digits as its factorization.

281833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

The square root of 281833 is about 530.8794590112. The cubic root of 281833 is about 65.5637744917.

The spelling of 281833 in words is "two hundred eighty-one thousand, eight hundred thirty-three".