281855 has 8 divisors (see below), whose sum is σ = 386592. Its totient is φ = 193248.

The previous prime is 281849. The next prime is 281857. The reversal of 281855 is 558182.

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 281855 - 2⁴ = 281839 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281857) 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, 3992 + ... + 4061.

It is an arithmetic number, because the mean of its divisors is an integer number (48324).

2²⁸¹⁸⁵⁵ is an apocalyptic number.

281855 is a deficient number, since it is larger than the sum of its proper divisors (104737).

281855 is an equidigital number, since it uses as much as digits as its factorization.

281855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8065.

The product of its digits is 3200, while the sum is 29.

The square root of 281855 is about 530.9001789414. The cubic root of 281855 is about 65.5654804257.

The spelling of 281855 in words is "two hundred eighty-one thousand, eight hundred fifty-five".