220856 has 16 divisors (see below), whose sum is σ = 436200. Its totient is φ = 104544.

The previous prime is 220841. The next prime is 220859. The reversal of 220856 is 658022.

It is a happy number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220859) by changing a digit.

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, 575 + ... + 878.

2²²⁰⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

220856 is a deficient number, since it is larger than the sum of its proper divisors (215344).

220856 is a wasteful number, since it uses less digits than its factorization.

220856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478 (or 1474 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 220856 is about 469.9531891582. The cubic root of 220856 is about 60.4463016458.

Adding to 220856 its reverse (658022), we get a palindrome (878878).

The spelling of 220856 in words is "two hundred twenty thousand, eight hundred fifty-six".