8194233281 has 4 divisors (see below), whose sum is σ = 8824558932. Its totient is φ = 7563907632.

The previous prime is 8194233259. The next prime is 8194233329. The reversal of 8194233281 is 1823324918.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1823324918 = 2 ⋅911662459.

It can be written as a sum of positive squares in 2 ways, for example, as 3079695025 + 5114538256 = 55495^2 + 71516^2 .

It is a cyclic number.

It is not a de Polignac number, because 8194233281 - 2⁶ = 8194233217 is a prime.

It is a super-2 number, since 2×8194233281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8194233211) 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, 315162806 + ... + 315162831.

It is an arithmetic number, because the mean of its divisors is an integer number (2206139733).

Almost surely, 2^8194233281 is an apocalyptic number.

It is an amenable number.

8194233281 is a deficient number, since it is larger than the sum of its proper divisors (630325651).

8194233281 is a wasteful number, since it uses less digits than its factorization.

8194233281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630325650.

The product of its digits is 82944, while the sum is 41.

The square root of 8194233281 is about 90522.0044022447. The cubic root of 8194233281 is about 2016.0568505406.

The spelling of 8194233281 in words is "eight billion, one hundred ninety-four million, two hundred thirty-three thousand, two hundred eighty-one".