2201855 has 4 divisors (see below), whose sum is σ = 2642232. Its totient is φ = 1761480.

The previous prime is 2201839. The next prime is 2201897. The reversal of 2201855 is 5581022.

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

It is not a de Polignac number, because 2201855 - 2⁴ = 2201839 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 2201855.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220181 + ... + 220190.

It is an arithmetic number, because the mean of its divisors is an integer number (660558).

2^2201855 is an apocalyptic number.

2201855 is a deficient number, since it is larger than the sum of its proper divisors (440377).

2201855 is an equidigital number, since it uses as much as digits as its factorization.

2201855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440376.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2201855 is about 1483.8648860324. The cubic root of 2201855 is about 130.0956889179.

Adding to 2201855 its reverse (5581022), we get a palindrome (7782877).

The spelling of 2201855 in words is "two million, two hundred one thousand, eight hundred fifty-five".