220206245 has 24 divisors (see below), whose sum is σ = 309048984. Its totient is φ = 150183936.

The previous prime is 220206241. The next prime is 220206263. The reversal of 220206245 is 542602022.

It can be written as a sum of positive squares in 4 ways, for example, as 188356 + 220017889 = 434^2 + 14833^2 .

It is not a de Polignac number, because 220206245 - 2² = 220206241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 220206245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220206241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44957 + ... + 49613.

It is an arithmetic number, because the mean of its divisors is an integer number (12877041).

Almost surely, 2^220206245 is an apocalyptic number.

It is an amenable number.

220206245 is a deficient number, since it is larger than the sum of its proper divisors (88842739).

220206245 is a wasteful number, since it uses less digits than its factorization.

220206245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4869 (or 4862 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 220206245 is about 14839.3478630296. The cubic root of 220206245 is about 603.8696605223.

Adding to 220206245 its reverse (542602022), we get a palindrome (762808267).

The spelling of 220206245 in words is "two hundred twenty million, two hundred six thousand, two hundred forty-five".