281233 has 2 divisors, whose sum is σ = 281234. Its totient is φ = 281232.

The previous prime is 281227. The next prime is 281243. The reversal of 281233 is 332182.

It is a happy number.

281233 is nontrivially palindromic in base 2.

It is the 217-th star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 253009 + 28224 = 503^2 + 168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281233 is a prime.

It is equal to p₂₄₅₃₅ and since 281233 and 24535 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 281233.

It is not a weakly prime, because it can be changed into another prime (281243) 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, 140616 + 140617.

It is an arithmetic number, because the mean of its divisors is an integer number (140617).

2²⁸¹²³³ is an apocalyptic number.

It is an amenable number.

281233 is a deficient number, since it is larger than the sum of its proper divisors (1).

281233 is an equidigital number, since it uses as much as digits as its factorization.

281233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 281233 is about 530.3140578940. The cubic root of 281233 is about 65.5172147515.

The spelling of 281233 in words is "two hundred eighty-one thousand, two hundred thirty-three".