8165081 has 8 divisors (see below), whose sum is σ = 8306760. Its totient is φ = 8024832.

The previous prime is 8165077. The next prime is 8165093. The reversal of 8165081 is 1805618.

It can be written as a sum of positive squares in 4 ways, for example, as 1960000 + 6205081 = 1400^2 + 2491^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8165081 - 2² = 8165077 is a prime.

It is a super-2 number, since 2×8165081² = 133337095473122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8165011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18641 + ... + 19073.

It is an arithmetic number, because the mean of its divisors is an integer number (1038345).

Almost surely, 2^8165081 is an apocalyptic number.

It is an amenable number.

8165081 is a deficient number, since it is larger than the sum of its proper divisors (141679).

8165081 is a wasteful number, since it uses less digits than its factorization.

8165081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 8165081 is about 2857.4605859049. The cubic root of 8165081 is about 201.3663195981.

The spelling of 8165081 in words is "eight million, one hundred sixty-five thousand, eighty-one".