220106605 has 8 divisors (see below), whose sum is σ = 268458264. Its totient is φ = 173198400.

The previous prime is 220106569. The next prime is 220106609. The reversal of 220106605 is 506601022.

It can be written as a sum of positive squares in 4 ways, for example, as 8491396 + 211615209 = 2914^2 + 14547^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-220106605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220106609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360526 + ... + 361135.

It is an arithmetic number, because the mean of its divisors is an integer number (33557283).

Almost surely, 2^220106605 is an apocalyptic number.

It is an amenable number.

220106605 is a deficient number, since it is larger than the sum of its proper divisors (48351659).

220106605 is an equidigital number, since it uses as much as digits as its factorization.

220106605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721727.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 220106605 is about 14835.9901927711. The cubic root of 220106605 is about 603.7785661476.

Adding to 220106605 its reverse (506601022), we get a palindrome (726707627).

The spelling of 220106605 in words is "two hundred twenty million, one hundred six thousand, six hundred five".