220122985 has 8 divisors (see below), whose sum is σ = 264423816. Its totient is φ = 175914240.

The previous prime is 220122967. The next prime is 220122997. The reversal of 220122985 is 589221022.

It can be written as a sum of positive squares in 4 ways, for example, as 120362841 + 99760144 = 10971^2 + 9988^2 .

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

It is not a de Polignac number, because 220122985 - 2¹⁵ = 220090217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 17646 + ... + 27415.

It is an arithmetic number, because the mean of its divisors is an integer number (33052977).

Almost surely, 2^220122985 is an apocalyptic number.

It is an amenable number.

220122985 is a deficient number, since it is larger than the sum of its proper divisors (44300831).

220122985 is an equidigital number, since it uses as much as digits as its factorization.

220122985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46043.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 220122985 is about 14836.5422184551. The cubic root of 220122985 is about 603.7935432048.

The spelling of 220122985 in words is "two hundred twenty million, one hundred twenty-two thousand, nine hundred eighty-five".