221543226774543 has 8 divisors (see below), whose sum is σ = 295391076116656. Its totient is φ = 147695430974400.

The previous prime is 221543226774539. The next prime is 221543226774587. The reversal of 221543226774543 is 345477622345122.

221543226774543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221543226774543 - 2² = 221543226774539 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 (221543226774523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2455828 + ... + 21192393.

It is an arithmetic number, because the mean of its divisors is an integer number (36923884514582).

Almost surely, 2^{221543226774543} is an apocalyptic number.

221543226774543 is a deficient number, since it is larger than the sum of its proper divisors (73847849342113).

221543226774543 is a wasteful number, since it uses less digits than its factorization.

221543226774543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26770985.

The product of its digits is 67737600, while the sum is 57.

The spelling of 221543226774543 in words is "two hundred twenty-one trillion, five hundred forty-three billion, two hundred twenty-six million, seven hundred seventy-four thousand, five hundred forty-three".