105199855 has 4 divisors (see below), whose sum is σ = 126239832. Its totient is φ = 84159880.

The previous prime is 105199823. The next prime is 105199877. The reversal of 105199855 is 558991501.

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

It is not a de Polignac number, because 105199855 - 2⁵ = 105199823 is a prime.

It is a super-2 number, since 2×105199855² = 22134018984042050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10519981 + ... + 10519990.

It is an arithmetic number, because the mean of its divisors is an integer number (31559958).

Almost surely, 2^105199855 is an apocalyptic number.

105199855 is a deficient number, since it is larger than the sum of its proper divisors (21039977).

105199855 is an equidigital number, since it uses as much as digits as its factorization.

105199855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21039976.

The product of its (nonzero) digits is 81000, while the sum is 43.

The square root of 105199855 is about 10256.6980554173. The cubic root of 105199855 is about 472.0685272883.

The spelling of 105199855 in words is "one hundred five million, one hundred ninety-nine thousand, eight hundred fifty-five".