42543342221 has 8 divisors (see below), whose sum is σ = 42705270240. Its totient is φ = 42381474768.

The previous prime is 42543342211. The next prime is 42543342239. The reversal of 42543342221 is 12224334524.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42543342221 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 (42543342211) 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, 1801790 + ... + 1825248.

It is an arithmetic number, because the mean of its divisors is an integer number (5338158780).

Almost surely, 2^42543342221 is an apocalyptic number.

It is an amenable number.

42543342221 is a deficient number, since it is larger than the sum of its proper divisors (161928019).

42543342221 is a wasteful number, since it uses less digits than its factorization.

42543342221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30283.

The product of its digits is 46080, while the sum is 32.

Adding to 42543342221 its reverse (12224334524), we get a palindrome (54767676745).

The spelling of 42543342221 in words is "forty-two billion, five hundred forty-three million, three hundred forty-two thousand, two hundred twenty-one".