281155 has 16 divisors (see below), whose sum is σ = 400320. Its totient is φ = 185472.

The previous prime is 281153. The next prime is 281159. The reversal of 281155 is 551182.

281155 = 8² + 9² + ... + 94².

It is not a de Polignac number, because 281155 - 2¹ = 281153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (281153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 877 + ... + 1153.

It is an arithmetic number, because the mean of its divisors is an integer number (25020).

2²⁸¹¹⁵⁵ is an apocalyptic number.

281155 is a deficient number, since it is larger than the sum of its proper divisors (119165).

281155 is a wasteful number, since it uses less digits than its factorization.

281155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318.

The product of its digits is 400, while the sum is 22.

The square root of 281155 is about 530.2405114663. The cubic root of 281155 is about 65.5111571228.

The spelling of 281155 in words is "two hundred eighty-one thousand, one hundred fifty-five".