281223325 has 24 divisors (see below), whose sum is σ = 358941312. Its totient is φ = 218459520.

The previous prime is 281223317. The next prime is 281223337. The reversal of 281223325 is 523322182.

It is not a de Polignac number, because 281223325 - 2³ = 281223317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 281223293 and 281223302.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 160102 + ... + 161848.

It is an arithmetic number, because the mean of its divisors is an integer number (14955888).

Almost surely, 2^281223325 is an apocalyptic number.

281223325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

281223325 is a deficient number, since it is larger than the sum of its proper divisors (77717987).

281223325 is a wasteful number, since it uses less digits than its factorization.

281223325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941 (or 1936 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 281223325 is about 16769.7145175462. The cubic root of 281223325 is about 655.1646343339.

The spelling of 281223325 in words is "two hundred eighty-one million, two hundred twenty-three thousand, three hundred twenty-five".