2220005 has 4 divisors (see below), whose sum is σ = 2664012. Its totient is φ = 1776000.

The previous prime is 2219999. The next prime is 2220007. The reversal of 2220005 is 5000222.

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 667489 + 1552516 = 817^2 + 1246^2 .

It is not a de Polignac number, because 2220005 - 2¹⁸ = 1957861 is a prime.

It is a super-4 number, since 4×2220005⁴ (a number of 26 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220007) 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, 221996 + ... + 222005.

It is an arithmetic number, because the mean of its divisors is an integer number (666003).

2^2220005 is an apocalyptic number.

It is an amenable number.

2220005 is a deficient number, since it is larger than the sum of its proper divisors (444007).

2220005 is an equidigital number, since it uses as much as digits as its factorization.

2220005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444006.

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 2220005 is about 1489.9681204643. The cubic root of 2220005 is about 130.4521729390.

Adding to 2220005 its reverse (5000222), we get a palindrome (7220227).

The spelling of 2220005 in words is "two million, two hundred twenty thousand, five".