221422000645543 has 4 divisors (see below), whose sum is σ = 221441504048128. Its totient is φ = 221402497242960.

The previous prime is 221422000645493. The next prime is 221422000645577. The reversal of 221422000645543 is 345546000224122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221422000645543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221422000645496 and 221422000645505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422300645543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9751684263 + ... + 9751706968.

It is an arithmetic number, because the mean of its divisors is an integer number (55360376012032).

Almost surely, 2^{221422000645543} is an apocalyptic number.

221422000645543 is a deficient number, since it is larger than the sum of its proper divisors (19503402585).

221422000645543 is a wasteful number, since it uses less digits than its factorization.

221422000645543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19503402584.

The product of its (nonzero) digits is 460800, while the sum is 40.

Adding to 221422000645543 its reverse (345546000224122), we get a palindrome (566968000869665).

The spelling of 221422000645543 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, six hundred forty-five thousand, five hundred forty-three".