220775 has 6 divisors (see below), whose sum is σ = 273792. Its totient is φ = 176600.

The previous prime is 220771. The next prime is 220783. The reversal of 220775 is 577022.

It is not a de Polignac number, because 220775 - 2² = 220771 is a prime.

It is a d-powerful number, because it can be written as 2 + 2¹³ + 7⁵ + 0 + 7⁶ + 5⁷ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4391 + ... + 4440.

It is an arithmetic number, because the mean of its divisors is an integer number (45632).

2²²⁰⁷⁷⁵ is an apocalyptic number.

220775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

220775 is a deficient number, since it is larger than the sum of its proper divisors (53017).

220775 is an equidigital number, since it uses as much as digits as its factorization.

220775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8841 (or 8836 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 220775 is about 469.8670024592. The cubic root of 220775 is about 60.4389110850.

Adding to 220775 its reverse (577022), we get a palindrome (797797).

The spelling of 220775 in words is "two hundred twenty thousand, seven hundred seventy-five".