280133 has 6 divisors (see below), whose sum is σ = 325926. Its totient is φ = 240072.

The previous prime is 280129. The next prime is 280139. The reversal of 280133 is 331082.

It can be written as a sum of positive squares in only one way, i.e., 247009 + 33124 = 497^2 + 182^2 .

It is not a de Polignac number, because 280133 - 2² = 280129 is a prime.

It is a super-3 number, since 3×280133³ = 65949889383337911, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280139) 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 in 5 ways as a sum of consecutive naturals, for example, 2810 + ... + 2907.

It is an arithmetic number, because the mean of its divisors is an integer number (54321).

2²⁸⁰¹³³ is an apocalyptic number.

It is an amenable number.

280133 is a deficient number, since it is larger than the sum of its proper divisors (45793).

280133 is an equidigital number, since it uses as much as digits as its factorization.

280133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5731 (or 5724 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 280133 is about 529.2759204800. The cubic root of 280133 is about 65.4316829408.

The spelling of 280133 in words is "two hundred eighty thousand, one hundred thirty-three".