100805565 has 16 divisors (see below), whose sum is σ = 184330368. Its totient is φ = 46082496.

The previous prime is 100805561. The next prime is 100805567. The reversal of 100805565 is 565508001.

It is a happy number.

It is not a de Polignac number, because 100805565 - 2² = 100805561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100805561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479922 + ... + 480131.

It is an arithmetic number, because the mean of its divisors is an integer number (11520648).

Almost surely, 2^100805565 is an apocalyptic number.

100805565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100805565 is a deficient number, since it is larger than the sum of its proper divisors (83524803).

100805565 is an equidigital number, since it uses as much as digits as its factorization.

100805565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960068.

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 100805565 is about 10040.1974582176. The cubic root of 100805565 is about 465.4019186630.

The spelling of 100805565 in words is "one hundred million, eight hundred five thousand, five hundred sixty-five".