281133 has 6 divisors (see below), whose sum is σ = 406094. Its totient is φ = 187416.

The previous prime is 281131. The next prime is 281153. The reversal of 281133 is 331182.

It can be written as a sum of positive squares in only one way, i.e., 272484 + 8649 = 522^2 + 93^2 .

It is not a de Polignac number, because 281133 - 2¹ = 281131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281133.

It is not an unprimeable number, because it can be changed into a prime (281131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15610 + ... + 15627.

2²⁸¹¹³³ is an apocalyptic number.

It is an amenable number.

281133 is a deficient number, since it is larger than the sum of its proper divisors (124961).

281133 is a wasteful number, since it uses less digits than its factorization.

281133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31243 (or 31240 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 281133 is about 530.2197657576. The cubic root of 281133 is about 65.5094483583.

It can be divided in two parts, 281 and 133, that multiplied together give a palindrome (37373).

The spelling of 281133 in words is "two hundred eighty-one thousand, one hundred thirty-three".