220710161 has 12 divisors (see below), whose sum is σ = 257637492. Its totient is φ = 188522208.

The previous prime is 220710157. The next prime is 220710187. The reversal of 220710161 is 161017022.

It can be written as a sum of positive squares in 2 ways, for example, as 98386561 + 122323600 = 9919^2 + 11060^2 .

It is not a de Polignac number, because 220710161 - 2² = 220710157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220710101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6671 + ... + 22043.

It is an arithmetic number, because the mean of its divisors is an integer number (21469791).

Almost surely, 2^220710161 is an apocalyptic number.

It is an amenable number.

220710161 is a deficient number, since it is larger than the sum of its proper divisors (36927331).

220710161 is a wasteful number, since it uses less digits than its factorization.

220710161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15680 (or 15673 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 220710161 is about 14856.3172085144. The cubic root of 220710161 is about 604.3299377510.

Adding to 220710161 its reverse (161017022), we get a palindrome (381727183).

The spelling of 220710161 in words is "two hundred twenty million, seven hundred ten thousand, one hundred sixty-one".