220965 has 8 divisors (see below), whose sum is σ = 353568. Its totient is φ = 117840.

The previous prime is 220939. The next prime is 220973. The reversal of 220965 is 569022.

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

It is not a de Polignac number, because 220965 - 2⁵ = 220933 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

220965 is a lucky number.

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, 7351 + ... + 7380.

It is an arithmetic number, because the mean of its divisors is an integer number (44196).

2²²⁰⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

220965 is a deficient number, since it is larger than the sum of its proper divisors (132603).

220965 is a wasteful number, since it uses less digits than its factorization.

220965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14739.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 220965 is about 470.0691438501. The cubic root of 220965 is about 60.4562441170.

Adding to 220965 its reverse (569022), we get a palindrome (789987).

The spelling of 220965 in words is "two hundred twenty thousand, nine hundred sixty-five".