281123425403 has 4 divisors (see below), whose sum is σ = 281124564168. Its totient is φ = 281122286640.

The previous prime is 281123425391. The next prime is 281123425417. The reversal of 281123425403 is 304524321182.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281123425403 is a prime.

It is a super-2 number, since 2×281123425403² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281123425703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26618 + ... + 750303.

It is an arithmetic number, because the mean of its divisors is an integer number (70281141042).

Almost surely, 2^281123425403 is an apocalyptic number.

281123425403 is a deficient number, since it is larger than the sum of its proper divisors (1138765).

281123425403 is an equidigital number, since it uses as much as digits as its factorization.

281123425403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138764.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 281123425403 its reverse (304524321182), we get a palindrome (585647746585).

The spelling of 281123425403 in words is "two hundred eighty-one billion, one hundred twenty-three million, four hundred twenty-five thousand, four hundred three".