281315 has 4 divisors (see below), whose sum is σ = 337584. Its totient is φ = 225048.

The previous prime is 281297. The next prime is 281317. The reversal of 281315 is 513182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 281315 - 2⁶ = 281251 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281315.

It is not an unprimeable number, because it can be changed into a prime (281317) 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, 28127 + ... + 28136.

It is an arithmetic number, because the mean of its divisors is an integer number (84396).

2²⁸¹³¹⁵ is an apocalyptic number.

281315 is a deficient number, since it is larger than the sum of its proper divisors (56269).

281315 is an equidigital number, since it uses as much as digits as its factorization.

281315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56268.

The product of its digits is 240, while the sum is 20.

The square root of 281315 is about 530.3913649373. The cubic root of 281315 is about 65.5235818202.

Adding to 281315 its reverse (513182), we get a palindrome (794497).

It can be divided in two parts, 2813 and 15, that multiplied together give a triangular number (42195 = T₂₉₀).

The spelling of 281315 in words is "two hundred eighty-one thousand, three hundred fifteen".