105055091 has 4 divisors (see below), whose sum is σ = 105142632. Its totient is φ = 104967552.

The previous prime is 105055051. The next prime is 105055109. The reversal of 105055091 is 190550501.

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

It is a cyclic number.

It is not a de Polignac number, because 105055091 - 2²² = 100860787 is a prime.

It is a super-2 number, since 2×105055091² = 22073144290036562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105055091.

It is not an unprimeable number, because it can be changed into a prime (105055021) 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, 41945 + ... + 44378.

It is an arithmetic number, because the mean of its divisors is an integer number (26285658).

Almost surely, 2^105055091 is an apocalyptic number.

105055091 is a deficient number, since it is larger than the sum of its proper divisors (87541).

105055091 is an equidigital number, since it uses as much as digits as its factorization.

105055091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87540.

The product of its (nonzero) digits is 1125, while the sum is 26.

The square root of 105055091 is about 10249.6385789939. The cubic root of 105055091 is about 471.8518923293.

The spelling of 105055091 in words is "one hundred five million, fifty-five thousand, ninety-one".