220606321 has 32 divisors (see below), whose sum is σ = 260467200. Its totient is φ = 185068800.

The previous prime is 220606289. The next prime is 220606333. The reversal of 220606321 is 123606022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 220606321 - 2⁵ = 220606289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220606292 and 220606301.

It is not an unprimeable number, because it can be changed into a prime (220606361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 922920 + ... + 923158.

It is an arithmetic number, because the mean of its divisors is an integer number (8139600).

Almost surely, 2^220606321 is an apocalyptic number.

It is an amenable number.

220606321 is a deficient number, since it is larger than the sum of its proper divisors (39860879).

220606321 is a wasteful number, since it uses less digits than its factorization.

220606321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 220606321 is about 14852.8219877571. The cubic root of 220606321 is about 604.2351475754.

The spelling of 220606321 in words is "two hundred twenty million, six hundred six thousand, three hundred twenty-one".