2113505 has 4 divisors (see below), whose sum is σ = 2536212. Its totient is φ = 1690800.

The previous prime is 2113471. The next prime is 2113511. The reversal of 2113505 is 5053112.

2113505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 253009 + 1860496 = 503^2 + 1364^2 .

It is not a de Polignac number, because 2113505 - 2⁸ = 2113249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211346 + ... + 211355.

It is an arithmetic number, because the mean of its divisors is an integer number (634053).

2^2113505 is an apocalyptic number.

It is an amenable number.

2113505 is a deficient number, since it is larger than the sum of its proper divisors (422707).

2113505 is an equidigital number, since it uses as much as digits as its factorization.

2113505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422706.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 2113505 is about 1453.7898747756. The cubic root of 2113505 is about 128.3318415898.

Adding to 2113505 its reverse (5053112), we get a palindrome (7166617).

The spelling of 2113505 in words is "two million, one hundred thirteen thousand, five hundred five".