208855105 has 8 divisors (see below), whose sum is σ = 250745832. Its totient is φ = 167004288.

The previous prime is 208855069. The next prime is 208855109. The reversal of 208855105 is 501558802.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27468081 + 181387024 = 5241^2 + 13468^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208855105 is a prime.

It is a super-2 number, since 2×208855105² = 87240909769122050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208855109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3099 + ... + 20671.

It is an arithmetic number, because the mean of its divisors is an integer number (31343229).

Almost surely, 2^208855105 is an apocalyptic number.

It is an amenable number.

208855105 is a deficient number, since it is larger than the sum of its proper divisors (41890727).

208855105 is a wasteful number, since it uses less digits than its factorization.

208855105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19955.

The product of its (nonzero) digits is 16000, while the sum is 34.

The square root of 208855105 is about 14451.8201275825. The cubic root of 208855105 is about 593.3100411328.

The spelling of 208855105 in words is "two hundred eight million, eight hundred fifty-five thousand, one hundred five".