281331 has 6 divisors (see below), whose sum is σ = 406380. Its totient is φ = 187548.

The previous prime is 281327. The next prime is 281339. The reversal of 281331 is 133182.

It is not a de Polignac number, because 281331 - 2² = 281327 is a prime.

It is a super-2 number, since 2×281331² = 158294263122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (281339) 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, 15621 + ... + 15638.

It is an arithmetic number, because the mean of its divisors is an integer number (67730).

2²⁸¹³³¹ is an apocalyptic number.

281331 is a deficient number, since it is larger than the sum of its proper divisors (125049).

281331 is a wasteful number, since it uses less digits than its factorization.

281331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31265 (or 31262 counting only the distinct ones).

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

The square root of 281331 is about 530.4064479246. The cubic root of 281331 is about 65.5248240308.

The spelling of 281331 in words is "two hundred eighty-one thousand, three hundred thirty-one".