281385103 has 4 divisors (see below), whose sum is σ = 281434608. Its totient is φ = 281335600.

The previous prime is 281385053. The next prime is 281385113. The reversal of 281385103 is 301583182.

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 281385103 - 2¹⁷ = 281254031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281385113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14926 + ... + 28027.

It is an arithmetic number, because the mean of its divisors is an integer number (70358652).

Almost surely, 2^281385103 is an apocalyptic number.

281385103 is a deficient number, since it is larger than the sum of its proper divisors (49505).

281385103 is an equidigital number, since it uses as much as digits as its factorization.

281385103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49504.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 281385103 is about 16774.5373408628. The cubic root of 281385103 is about 655.2902413953.

The spelling of 281385103 in words is "two hundred eighty-one million, three hundred eighty-five thousand, one hundred three".