220285171 has 4 divisors (see below), whose sum is σ = 220320072. Its totient is φ = 220250272.

The previous prime is 220285159. The next prime is 220285181. The reversal of 220285171 is 171582022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 171582022 = 2 ⋅85791011.

It is a cyclic number.

It is not a de Polignac number, because 220285171 - 2⁵ = 220285139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220285151) 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 3 ways as a sum of consecutive naturals, for example, 5041 + ... + 21586.

It is an arithmetic number, because the mean of its divisors is an integer number (55080018).

Almost surely, 2^220285171 is an apocalyptic number.

220285171 is a deficient number, since it is larger than the sum of its proper divisors (34901).

220285171 is an equidigital number, since it uses as much as digits as its factorization.

220285171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34900.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 220285171 is about 14842.0069734521. The cubic root of 220285171 is about 603.9417979311.

The spelling of 220285171 in words is "two hundred twenty million, two hundred eighty-five thousand, one hundred seventy-one".