281112823 has 4 divisors (see below), whose sum is σ = 281448720. Its totient is φ = 280776928.

The previous prime is 281112779. The next prime is 281112841. The reversal of 281112823 is 328211182.

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 281112823 - 2¹⁷ = 280981751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 281112791 and 281112800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281112023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166690 + ... + 168367.

It is an arithmetic number, because the mean of its divisors is an integer number (70362180).

Almost surely, 2^281112823 is an apocalyptic number.

281112823 is a deficient number, since it is larger than the sum of its proper divisors (335897).

281112823 is an equidigital number, since it uses as much as digits as its factorization.

281112823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335896.

The product of its digits is 1536, while the sum is 28.

The square root of 281112823 is about 16766.4195044738. The cubic root of 281112823 is about 655.0788110984.

The spelling of 281112823 in words is "two hundred eighty-one million, one hundred twelve thousand, eight hundred twenty-three".