220240321 has 8 divisors (see below), whose sum is σ = 266509440. Its totient is φ = 177672768.

The previous prime is 220240301. The next prime is 220240409. The reversal of 220240321 is 123042022.

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

It is not a de Polignac number, because 220240321 - 2⁷ = 220240193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220240295 and 220240304.

It is not an unprimeable number, because it can be changed into a prime (220240301) 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, 925261 + ... + 925498.

It is an arithmetic number, because the mean of its divisors is an integer number (33313680).

Almost surely, 2^220240321 is an apocalyptic number.

It is an amenable number.

220240321 is a deficient number, since it is larger than the sum of its proper divisors (46269119).

220240321 is a wasteful number, since it uses less digits than its factorization.

220240321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850783.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 220240321 is about 14840.4959822777. The cubic root of 220240321 is about 603.9008076880.

Adding to 220240321 its reverse (123042022), we get a palindrome (343282343).

The spelling of 220240321 in words is "two hundred twenty million, two hundred forty thousand, three hundred twenty-one".