280231 has 16 divisors (see below), whose sum is σ = 352000. Its totient is φ = 222264.

The previous prime is 280229. The next prime is 280243. The reversal of 280231 is 132082.

It is a happy number.

It is not a de Polignac number, because 280231 - 2¹ = 280229 is a prime.

It is a super-2 number, since 2×280231² = 157058826722, which contains 22 as substring.

It is a Duffinian number.

280231 is a modest number, since divided by 231 gives 28 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6496 + ... + 6538.

It is an arithmetic number, because the mean of its divisors is an integer number (22000).

2²⁸⁰²³¹ is an apocalyptic number.

280231 is a deficient number, since it is larger than the sum of its proper divisors (71769).

280231 is an equidigital number, since it uses as much as digits as its factorization.

280231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 280231 is about 529.3684916955. The cubic root of 280231 is about 65.4393121233.

The spelling of 280231 in words is "two hundred eighty thousand, two hundred thirty-one".