220045 has 8 divisors (see below), whose sum is σ = 301824. Its totient is φ = 150864.

The previous prime is 220021. The next prime is 220057. The reversal of 220045 is 540022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220045 - 2⁵ = 220013 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3109 + ... + 3178.

It is an arithmetic number, because the mean of its divisors is an integer number (37728).

2²²⁰⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

220045 is a deficient number, since it is larger than the sum of its proper divisors (81779).

220045 is an equidigital number, since it uses as much as digits as its factorization.

220045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6299.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 220045 is about 469.0895436908. The cubic root of 220045 is about 60.3722230947.

Adding to 220045 its reverse (540022), we get a palindrome (760067).

The spelling of 220045 in words is "two hundred twenty thousand, forty-five".