2205881 has 4 divisors (see below), whose sum is σ = 2322000. Its totient is φ = 2089764.

The previous prime is 2205839. The next prime is 2205883. The reversal of 2205881 is 1885022.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2205881 is a prime.

It is a super-2 number, since 2×2205881² = 9731821972322, which contains 22 as substring.

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 2205881.

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, 58031 + ... + 58068.

It is an arithmetic number, because the mean of its divisors is an integer number (580500).

2^2205881 is an apocalyptic number.

It is an amenable number.

2205881 is a deficient number, since it is larger than the sum of its proper divisors (116119).

2205881 is a wasteful number, since it uses less digits than its factorization.

2205881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116118.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 2205881 is about 1485.2208589971. The cubic root of 2205881 is about 130.1749321530.

The spelling of 2205881 in words is "two million, two hundred five thousand, eight hundred eighty-one".