42223161821 has 8 divisors (see below), whose sum is σ = 42863553984. Its totient is φ = 41584445280.

The previous prime is 42223161809. The next prime is 42223161853. The reversal of 42223161821 is 12816132224.

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-42223161821 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 (42223161121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368081 + ... + 468966.

It is an arithmetic number, because the mean of its divisors is an integer number (5357944248).

Almost surely, 2^42223161821 is an apocalyptic number.

It is an amenable number.

42223161821 is a deficient number, since it is larger than the sum of its proper divisors (640392163).

42223161821 is an equidigital number, since it uses as much as digits as its factorization.

42223161821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837811.

The product of its digits is 9216, while the sum is 32.

The spelling of 42223161821 in words is "forty-two billion, two hundred twenty-three million, one hundred sixty-one thousand, eight hundred twenty-one".