8204197081 has 4 divisors (see below), whose sum is σ = 8258529664. Its totient is φ = 8149864500.

The previous prime is 8204197039. The next prime is 8204197087. The reversal of 8204197081 is 1807914028.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8204197081 - 2¹⁹ = 8203672793 is a prime.

It is a super-2 number, since 2×8204197081² (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 (8204197087) 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, 27166065 + ... + 27166366.

It is an arithmetic number, because the mean of its divisors is an integer number (2064632416).

Almost surely, 2^8204197081 is an apocalyptic number.

It is an amenable number.

8204197081 is a deficient number, since it is larger than the sum of its proper divisors (54332583).

8204197081 is a wasteful number, since it uses less digits than its factorization.

8204197081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54332582.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 8204197081 is about 90577.0229197229. The cubic root of 8204197081 is about 2016.8736628119.

The spelling of 8204197081 in words is "eight billion, two hundred four million, one hundred ninety-seven thousand, eighty-one".