221443041423 has 16 divisors (see below), whose sum is σ = 313814708480. Its totient is φ = 138500907264.

The previous prime is 221443041401. The next prime is 221443041493. The reversal of 221443041423 is 324140344122.

It is not a de Polignac number, because 221443041423 - 2⁶ = 221443041359 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 (221443041493) 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, 18853186 + ... + 18864927.

It is an arithmetic number, because the mean of its divisors is an integer number (19613419280).

Almost surely, 2^221443041423 is an apocalyptic number.

221443041423 is a deficient number, since it is larger than the sum of its proper divisors (92371667057).

221443041423 is a wasteful number, since it uses less digits than its factorization.

221443041423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37718238.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 221443041423 its reverse (324140344122), we get a palindrome (545583385545).

The spelling of 221443041423 in words is "two hundred twenty-one billion, four hundred forty-three million, forty-one thousand, four hundred twenty-three".