220424321 has 8 divisors (see below), whose sum is σ = 242901120. Its totient is φ = 198736272.

The previous prime is 220424311. The next prime is 220424327. The reversal of 220424321 is 123424022.

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 220424321 - 2¹⁰ = 220423297 is a prime.

It is a super-2 number, since 2×220424321² = 97173762576622082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220424293 and 220424302.

It is not an unprimeable number, because it can be changed into a prime (220424327) 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 7 ways as a sum of consecutive naturals, for example, 196601 + ... + 197718.

It is an arithmetic number, because the mean of its divisors is an integer number (30362640).

Almost surely, 2^220424321 is an apocalyptic number.

It is an amenable number.

220424321 is a deficient number, since it is larger than the sum of its proper divisors (22476799).

220424321 is a wasteful number, since it uses less digits than its factorization.

220424321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394375.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 220424321 is about 14846.6939417501. The cubic root of 220424321 is about 604.0689373898.

Adding to 220424321 its reverse (123424022), we get a palindrome (343848343).

The spelling of 220424321 in words is "two hundred twenty million, four hundred twenty-four thousand, three hundred twenty-one".