221040543 has 16 divisors (see below), whose sum is σ = 299126880. Its totient is φ = 145173504.

The previous prime is 221040541. The next prime is 221040559. The reversal of 221040543 is 345040122.

It is not a de Polignac number, because 221040543 - 2¹ = 221040541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221040541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56763 + ... + 60531.

It is an arithmetic number, because the mean of its divisors is an integer number (18695430).

Almost surely, 2^221040543 is an apocalyptic number.

221040543 is a deficient number, since it is larger than the sum of its proper divisors (78086337).

221040543 is a wasteful number, since it uses less digits than its factorization.

221040543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058.

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

The square root of 221040543 is about 14867.4322934392. The cubic root of 221040543 is about 604.6313287873.

Adding to 221040543 its reverse (345040122), we get a palindrome (566080665).

The spelling of 221040543 in words is "two hundred twenty-one million, forty thousand, five hundred forty-three".