2113555 has 4 divisors (see below), whose sum is σ = 2536272. Its totient is φ = 1690840.

The previous prime is 2113523. The next prime is 2113567. The reversal of 2113555 is 5553112.

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

It is not a de Polignac number, because 2113555 - 2⁵ = 2113523 is a prime.

It is a super-2 number, since 2×2113555² = 8934229476050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211351 + ... + 211360.

It is an arithmetic number, because the mean of its divisors is an integer number (634068).

2^2113555 is an apocalyptic number.

2113555 is a deficient number, since it is larger than the sum of its proper divisors (422717).

2113555 is an equidigital number, since it uses as much as digits as its factorization.

2113555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422716.

The product of its digits is 750, while the sum is 22.

The square root of 2113555 is about 1453.8070711068. The cubic root of 2113555 is about 128.3328535804.

Adding to 2113555 its reverse (5553112), we get a palindrome (7666667).

The spelling of 2113555 in words is "two million, one hundred thirteen thousand, five hundred fifty-five".