208281 has 4 divisors (see below), whose sum is σ = 277712. Its totient is φ = 138852.

The previous prime is 208279. The next prime is 208283. The reversal of 208281 is 182802.

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.

It is an interprime number because it is at equal distance from previous prime (208279) and next prime (208283).

It is not a de Polignac number, because 208281 - 2¹ = 208279 is a prime.

It is a super-2 number, since 2×208281² = 86761949922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208283) 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, 34711 + ... + 34716.

It is an arithmetic number, because the mean of its divisors is an integer number (69428).

2²⁰⁸²⁸¹ is an apocalyptic number.

It is an amenable number.

208281 is a deficient number, since it is larger than the sum of its proper divisors (69431).

208281 is an equidigital number, since it uses as much as digits as its factorization.

208281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69430.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 208281 is about 456.3781326926. The cubic root of 208281 is about 59.2765908169.

The spelling of 208281 in words is "two hundred eight thousand, two hundred eighty-one".