220544 has 16 divisors (see below), whose sum is σ = 439620. Its totient is φ = 110208.

The previous prime is 220543. The next prime is 220553. The reversal of 220544 is 445022.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220544.

It is not an unprimeable number, because it can be changed into a prime (220543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 734 + ... + 989.

2²²⁰⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

220544 is a deficient number, since it is larger than the sum of its proper divisors (219076).

220544 is an equidigital number, since it uses as much as digits as its factorization.

220544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737 (or 1725 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 220544 is about 469.6211238861. The cubic root of 220544 is about 60.4178243668.

Adding to 220544 its reverse (445022), we get a palindrome (665566).

It can be divided in two parts, 2205 and 44, that multiplied together give a triangular number (97020 = T₄₄₀).

The spelling of 220544 in words is "two hundred twenty thousand, five hundred forty-four".