221423424043 has 16 divisors (see below), whose sum is σ = 224389114560. Its totient is φ = 218474717184.

The previous prime is 221423424023. The next prime is 221423424091. The reversal of 221423424043 is 340424324122.

It is a cyclic number.

It is not a de Polignac number, because 221423424043 - 2⁹ = 221423423531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221423423996 and 221423424014.

It is not an unprimeable number, because it can be changed into a prime (221423424023) 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, 46194855 + ... + 46199647.

It is an arithmetic number, because the mean of its divisors is an integer number (14024319660).

Almost surely, 2^221423424043 is an apocalyptic number.

221423424043 is a deficient number, since it is larger than the sum of its proper divisors (2965690517).

221423424043 is a wasteful number, since it uses less digits than its factorization.

221423424043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6438.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 221423424043 its reverse (340424324122), we get a palindrome (561847748165).

The spelling of 221423424043 in words is "two hundred twenty-one billion, four hundred twenty-three million, four hundred twenty-four thousand, forty-three".