2205889 has 4 divisors (see below), whose sum is σ = 2521024. Its totient is φ = 1890756.

The previous prime is 2205887. The next prime is 2205893. The reversal of 2205889 is 9885022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2205889 - 2¹ = 2205887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2205883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157557 + ... + 157570.

It is an arithmetic number, because the mean of its divisors is an integer number (630256).

2^2205889 is an apocalyptic number.

It is an amenable number.

2205889 is a deficient number, since it is larger than the sum of its proper divisors (315135).

2205889 is an equidigital number, since it uses as much as digits as its factorization.

2205889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315134.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 2205889 is about 1485.2235521968. The cubic root of 2205889 is about 130.1750895199.

It can be divided in two parts, 2 and 205889, that multiplied together give a triangular number (411778 = T₉₀₇).

The spelling of 2205889 in words is "two million, two hundred five thousand, eight hundred eighty-nine".