2117543105 has 4 divisors (see below), whose sum is σ = 2541051732. Its totient is φ = 1694034480.

The previous prime is 2117543089. The next prime is 2117543111. The reversal of 2117543105 is 5013457112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1275846961 + 841696144 = 35719^2 + 29012^2 .

It is not a de Polignac number, because 2117543105 - 2⁴ = 2117543089 is a prime.

It is a Duffinian 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, 211754306 + ... + 211754315.

It is an arithmetic number, because the mean of its divisors is an integer number (635262933).

Almost surely, 2^2117543105 is an apocalyptic number.

It is an amenable number.

2117543105 is a deficient number, since it is larger than the sum of its proper divisors (423508627).

2117543105 is an equidigital number, since it uses as much as digits as its factorization.

2117543105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423508626.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 2117543105 is about 46016.7698236197. The cubic root of 2117543105 is about 1284.1352072191.

The spelling of 2117543105 in words is "two billion, one hundred seventeen million, five hundred forty-three thousand, one hundred five".