2217000220205 has 16 divisors (see below), whose sum is σ = 2704172432304. Its totient is φ = 1744422151680.

The previous prime is 2217000220177. The next prime is 2217000220207. The reversal of 2217000220205 is 5020220007122.

It can be written as a sum of positive squares in 8 ways, for example, as 2371105636 + 2214629114569 = 48694^2 + 1488163^2 .

It is not a de Polignac number, because 2217000220205 - 2¹⁶ = 2217000154669 is a prime.

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 (2217000220207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5204879 + ... + 5614691.

It is an arithmetic number, because the mean of its divisors is an integer number (169010777019).

Almost surely, 2^{2217000220205} is an apocalyptic number.

It is an amenable number.

2217000220205 is a deficient number, since it is larger than the sum of its proper divisors (487172212099).

2217000220205 is a wasteful number, since it uses less digits than its factorization.

2217000220205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427616.

The product of its (nonzero) digits is 1120, while the sum is 23.

Adding to 2217000220205 its reverse (5020220007122), we get a palindrome (7237220227327).

The spelling of 2217000220205 in words is "two trillion, two hundred seventeen billion, two hundred twenty thousand, two hundred five".