8281000001 has 4 divisors (see below), whose sum is σ = 8323035732. Its totient is φ = 8238964272.

The previous prime is 8280999989. The next prime is 8281000009. The reversal of 8281000001 is 1000001828.

It is a Cunningham number, because it is equal to 91000²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8113685776 + 167314225 = 90076^2 + 12935^2 .

It is a cyclic number.

It is not a de Polignac number, because 8281000001 - 2¹⁰ = 8280998977 is a prime.

It is a super-2 number, since 2×8281000001² (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 (8281000009) 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, 21017570 + ... + 21017963.

It is an arithmetic number, because the mean of its divisors is an integer number (2080758933).

Almost surely, 2^8281000001 is an apocalyptic number.

It is an amenable number.

8281000001 is a deficient number, since it is larger than the sum of its proper divisors (42035731).

8281000001 is a wasteful number, since it uses less digits than its factorization.

8281000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42035730.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 8281000001 is about 91000.0000054945. Note that the first 5 decimals coincide. The cubic root of 8281000001 is about 2023.1477245941.

Adding to 8281000001 its reverse (1000001828), we get a palindrome (9281001829).

It can be divided in two parts, 828 and 1000001, that multiplied together give a palindrome (828000828).

The spelling of 8281000001 in words is "eight billion, two hundred eighty-one million, one", and thus it is an aban number.