221544340343 has 8 divisors (see below), whose sum is σ = 226266566400. Its totient is φ = 216822469240.

The previous prime is 221544340337. The next prime is 221544340363. The reversal of 221544340343 is 343043445122.

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 221544340343 - 2¹⁸ = 221544078199 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 (221544340363) 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, 1456508 + ... + 1601406.

It is an arithmetic number, because the mean of its divisors is an integer number (28283320800).

Almost surely, 2^221544340343 is an apocalyptic number.

221544340343 is a deficient number, since it is larger than the sum of its proper divisors (4722226057).

221544340343 is a wasteful number, since it uses less digits than its factorization.

221544340343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177477.

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 221544340343 its reverse (343043445122), we get a palindrome (564587785465).

The spelling of 221544340343 in words is "two hundred twenty-one billion, five hundred forty-four million, three hundred forty thousand, three hundred forty-three".