283381 has 4 divisors (see below), whose sum is σ = 323872. Its totient is φ = 242892.

The previous prime is 283369. The next prime is 283397. The reversal of 283381 is 183382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183382 = 2 ⋅91691.

It is a cyclic number.

It is not a de Polignac number, because 283381 - 2⁹ = 282869 is a prime.

It is a super-2 number, since 2×283381² = 160609582322, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁴ + 8⁴ + 3³ + 3⁶ + 8⁶ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (283181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20235 + ... + 20248.

It is an arithmetic number, because the mean of its divisors is an integer number (80968).

2²⁸³³⁸¹ is an apocalyptic number.

It is an amenable number.

283381 is a deficient number, since it is larger than the sum of its proper divisors (40491).

283381 is an equidigital number, since it uses as much as digits as its factorization.

283381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40490.

The product of its digits is 1152, while the sum is 25.

The square root of 283381 is about 532.3354205762. The cubic root of 283381 is about 65.6835942286.

Subtracting from 283381 its reverse (183382), we obtain a palindrome (99999).

The spelling of 283381 in words is "two hundred eighty-three thousand, three hundred eighty-one".