220659 has 4 divisors (see below), whose sum is σ = 294216. Its totient is φ = 147104.

The previous prime is 220613. The next prime is 220663. The reversal of 220659 is 956022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220659 - 2⁸ = 220403 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (220699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36774 + ... + 36779.

It is an arithmetic number, because the mean of its divisors is an integer number (73554).

2²²⁰⁶⁵⁹ is an apocalyptic number.

220659 is a deficient number, since it is larger than the sum of its proper divisors (73557).

220659 is an equidigital number, since it uses as much as digits as its factorization.

220659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73556.

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

The square root of 220659 is about 469.7435470552. The cubic root of 220659 is about 60.4283239232.

The spelling of 220659 in words is "two hundred twenty thousand, six hundred fifty-nine".