281422385 has 4 divisors (see below), whose sum is σ = 337706868. Its totient is φ = 225137904.

The previous prime is 281422367. The next prime is 281422391. The reversal of 281422385 is 583224182.

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

It can be written as a sum of positive squares in 2 ways, for example, as 204404209 + 77018176 = 14297^2 + 8776^2 .

It is a cyclic number.

It is not a de Polignac number, because 281422385 - 2⁶ = 281422321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28142234 + ... + 28142243.

It is an arithmetic number, because the mean of its divisors is an integer number (84426717).

Almost surely, 2^281422385 is an apocalyptic number.

It is an amenable number.

281422385 is a deficient number, since it is larger than the sum of its proper divisors (56284483).

281422385 is an equidigital number, since it uses as much as digits as its factorization.

281422385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56284482.

The product of its digits is 30720, while the sum is 35.

The square root of 281422385 is about 16775.6485716648. The cubic root of 281422385 is about 655.3191809182.

The spelling of 281422385 in words is "two hundred eighty-one million, four hundred twenty-two thousand, three hundred eighty-five".