221543164565430 has 32 divisors (see below), whose sum is σ = 562980277014624. Its totient is φ = 55602990322176.

The previous prime is 221543164565419. The next prime is 221543164565477. The reversal of 221543164565430 is 34565461345122.

221543164565430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217199180437 + ... + 217199181456.

It is an arithmetic number, because the mean of its divisors is an integer number (17593133656707).

Almost surely, 2^{221543164565430} is an apocalyptic number.

221543164565430 is an abundant number, since it is smaller than the sum of its proper divisors (341437112449194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221543164565430 is a wasteful number, since it uses less digits than its factorization.

221543164565430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434398361920.

The product of its (nonzero) digits is 10368000, while the sum is 51.

The spelling of 221543164565430 in words is "two hundred twenty-one trillion, five hundred forty-three billion, one hundred sixty-four million, five hundred sixty-five thousand, four hundred thirty".