220221543 has 4 divisors (see below), whose sum is σ = 293628728. Its totient is φ = 146814360.

The previous prime is 220221541. The next prime is 220221583. The reversal of 220221543 is 345122022.

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

It is not a de Polignac number, because 220221543 - 2¹ = 220221541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221541) 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 3 ways as a sum of consecutive naturals, for example, 36703588 + ... + 36703593.

It is an arithmetic number, because the mean of its divisors is an integer number (73407182).

Almost surely, 2^220221543 is an apocalyptic number.

220221543 is a deficient number, since it is larger than the sum of its proper divisors (73407185).

220221543 is an equidigital number, since it uses as much as digits as its factorization.

220221543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73407184.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 220221543 is about 14839.8633079958. The cubic root of 220221543 is about 603.8836440557.

Adding to 220221543 its reverse (345122022), we get a palindrome (565343565).

The spelling of 220221543 in words is "two hundred twenty million, two hundred twenty-one thousand, five hundred forty-three".