281231 has 8 divisors (see below), whose sum is σ = 303264. Its totient is φ = 259840.

The previous prime is 281227. The next prime is 281233. The reversal of 281231 is 132182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 281231 - 2² = 281227 is a prime.

It is a super-2 number, since 2×281231² = 158181750722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a plaindrome in base 12.

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 281231.

It is not an unprimeable number, because it can be changed into a prime (281233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091 + ... + 1323.

It is an arithmetic number, because the mean of its divisors is an integer number (37908).

2²⁸¹²³¹ is an apocalyptic number.

281231 is a deficient number, since it is larger than the sum of its proper divisors (22033).

281231 is a wasteful number, since it uses less digits than its factorization.

281231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321.

The product of its digits is 96, while the sum is 17.

The square root of 281231 is about 530.3121722156. The cubic root of 281231 is about 65.5170594417.

It can be divided in two parts, 281 and 231, that added together give a 9-th power (512 = 2⁹).

The spelling of 281231 in words is "two hundred eighty-one thousand, two hundred thirty-one".