2220205 has 8 divisors (see below), whose sum is σ = 2869272. Its totient is φ = 1639488.

The previous prime is 2220203. The next prime is 2220209. The reversal of 2220205 is 5020222.

It can be written as a sum of positive squares in 4 ways, for example, as 155236 + 2064969 = 394^2 + 1437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2220205 - 2¹ = 2220203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17014 + ... + 17143.

It is an arithmetic number, because the mean of its divisors is an integer number (358659).

2^2220205 is an apocalyptic number.

It is an amenable number.

2220205 is a deficient number, since it is larger than the sum of its proper divisors (649067).

2220205 is a wasteful number, since it uses less digits than its factorization.

2220205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34175.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 2220205 is about 1490.0352344827. The cubic root of 2220205 is about 130.4560902952.

Adding to 2220205 its reverse (5020222), we get a palindrome (7240427).

The spelling of 2220205 in words is "two million, two hundred twenty thousand, two hundred five".