281223347 has 4 divisors (see below), whose sum is σ = 288824016. Its totient is φ = 273622680.

The previous prime is 281223343. The next prime is 281223373. The reversal of 281223347 is 743322182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 743322182 = 2 ⋅371661091.

It is a cyclic number.

It is not a de Polignac number, because 281223347 - 2² = 281223343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281223343) by changing a digit.

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, 3800279 + ... + 3800352.

It is an arithmetic number, because the mean of its divisors is an integer number (72206004).

Almost surely, 2^281223347 is an apocalyptic number.

281223347 is a deficient number, since it is larger than the sum of its proper divisors (7600669).

281223347 is an equidigital number, since it uses as much as digits as its factorization.

281223347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7600668.

The product of its digits is 16128, while the sum is 32.

The square root of 281223347 is about 16769.7151734906. The cubic root of 281223347 is about 655.1646514183.

The spelling of 281223347 in words is "two hundred eighty-one million, two hundred twenty-three thousand, three hundred forty-seven".