220105 has 4 divisors (see below), whose sum is σ = 264132. Its totient is φ = 176080.

The previous prime is 220063. The next prime is 220123. The reversal of 220105 is 501022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84681 + 135424 = 291^2 + 368^2 .

It is not a de Polignac number, because 220105 - 2⁷ = 219977 is a prime.

It is a super-2 number, since 2×220105² = 96892422050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220091 and 220100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22006 + ... + 22015.

It is an arithmetic number, because the mean of its divisors is an integer number (66033).

2²²⁰¹⁰⁵ is an apocalyptic number.

It is an amenable number.

220105 is a deficient number, since it is larger than the sum of its proper divisors (44027).

220105 is an equidigital number, since it uses as much as digits as its factorization.

220105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44026.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 220105 is about 469.1534930063. The cubic root of 220105 is about 60.3777098576.

Adding to 220105 its reverse (501022), we get a palindrome (721127).

It can be divided in two parts, 220 and 105, that added together give a triangular number (325 = T₂₅).

The spelling of 220105 in words is "two hundred twenty thousand, one hundred five".