2113043605 has 4 divisors (see below), whose sum is σ = 2535652332. Its totient is φ = 1690434880.

The previous prime is 2113043579. The next prime is 2113043651. The reversal of 2113043605 is 5063403112.

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 231739729 + 1881303876 = 15223^2 + 43374^2 .

It is not a de Polignac number, because 2113043605 - 2¹³ = 2113035413 is a prime.

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 2113043605.

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, 211304356 + ... + 211304365.

It is an arithmetic number, because the mean of its divisors is an integer number (633913083).

Almost surely, 2^2113043605 is an apocalyptic number.

It is an amenable number.

2113043605 is a deficient number, since it is larger than the sum of its proper divisors (422608727).

2113043605 is an equidigital number, since it uses as much as digits as its factorization.

2113043605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422608726.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 2113043605 is about 45967.8540395351. The cubic root of 2113043605 is about 1283.2250228862.

Adding to 2113043605 its reverse (5063403112), we get a palindrome (7176446717).

The spelling of 2113043605 in words is "two billion, one hundred thirteen million, forty-three thousand, six hundred five".