805201165 has 4 divisors (see below), whose sum is σ = 966241404. Its totient is φ = 644160928.

The previous prime is 805201123. The next prime is 805201207. The reversal of 805201165 is 561102508.

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

It is an interprime number because it is at equal distance from previous prime (805201123) and next prime (805201207).

It can be written as a sum of positive squares in 2 ways, for example, as 544475556 + 260725609 = 23334^2 + 16147^2 .

It is a cyclic number.

It is not a de Polignac number, because 805201165 - 2⁹ = 805200653 is a prime.

It is a super-2 number, since 2×805201165² = 1296697832234714450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80520112 + ... + 80520121.

It is an arithmetic number, because the mean of its divisors is an integer number (241560351).

Almost surely, 2^805201165 is an apocalyptic number.

It is an amenable number.

805201165 is a deficient number, since it is larger than the sum of its proper divisors (161040239).

805201165 is a wasteful number, since it uses less digits than its factorization.

805201165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161040238.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 805201165 is about 28376.0667640884. The cubic root of 805201165 is about 930.3252282953.

The spelling of 805201165 in words is "eight hundred five million, two hundred one thousand, one hundred sixty-five".