220505321 has 8 divisors (see below), whose sum is σ = 223195584. Its totient is φ = 217825200.

The previous prime is 220505309. The next prime is 220505323. The reversal of 220505321 is 123505022.

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

It is a cyclic number.

It is not a de Polignac number, because 220505321 - 2¹⁴ = 220488937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220505293 and 220505302.

It is not an unprimeable number, because it can be changed into a prime (220505323) 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 7 ways as a sum of consecutive naturals, for example, 46946 + ... + 51428.

It is an arithmetic number, because the mean of its divisors is an integer number (27899448).

Almost surely, 2^220505321 is an apocalyptic number.

It is an amenable number.

220505321 is a deficient number, since it is larger than the sum of its proper divisors (2690263).

220505321 is a wasteful number, since it uses less digits than its factorization.

220505321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 220505321 is about 14849.4215712263. The cubic root of 220505321 is about 604.1429213487.

The spelling of 220505321 in words is "two hundred twenty million, five hundred five thousand, three hundred twenty-one".