105811806 has 8 divisors (see below), whose sum is σ = 211623624. Its totient is φ = 35270600.

The previous prime is 105811801. The next prime is 105811829. The reversal of 105811806 is 608118501.

It is a happy number.

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

105811806 is an admirable number.

It is a super-2 number, since 2×105811806² = 22392276577963272, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105811801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8817645 + ... + 8817656.

It is an arithmetic number, because the mean of its divisors is an integer number (26452953).

Almost surely, 2^105811806 is an apocalyptic number.

105811806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105811806 is a wasteful number, since it uses less digits than its factorization.

105811806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17635306.

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 105811806 is about 10286.4865721975. The cubic root of 105811806 is about 472.9821041611.

The spelling of 105811806 in words is "one hundred five million, eight hundred eleven thousand, eight hundred six".