221550020543 has 8 divisors (see below), whose sum is σ = 233263363200. Its totient is φ = 209841959448.

The previous prime is 221550020539. The next prime is 221550020579. The reversal of 221550020543 is 345020055122.

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 221550020543 - 2² = 221550020539 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 (221550020243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1234133 + ... + 1402206.

It is an arithmetic number, because the mean of its divisors is an integer number (29157920400).

Almost surely, 2^221550020543 is an apocalyptic number.

221550020543 is a deficient number, since it is larger than the sum of its proper divisors (11713342657).

221550020543 is a wasteful number, since it uses less digits than its factorization.

221550020543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640781.

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 221550020543 its reverse (345020055122), we get a palindrome (566570075665).

The spelling of 221550020543 in words is "two hundred twenty-one billion, five hundred fifty million, twenty thousand, five hundred forty-three".