221467478441 has 8 divisors (see below), whose sum is σ = 241609129344. Its totient is φ = 201327201520.

The previous prime is 221467478413. The next prime is 221467478467. The reversal of 221467478441 is 144874764122.

221467478441 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221467478441 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221467478441.

It is not an unprimeable number, because it can be changed into a prime (221467474441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9296 + ... + 665598.

It is an arithmetic number, because the mean of its divisors is an integer number (30201141168).

Almost surely, 2^221467478441 is an apocalyptic number.

It is an amenable number.

221467478441 is a deficient number, since it is larger than the sum of its proper divisors (20141650903).

221467478441 is a wasteful number, since it uses less digits than its factorization.

221467478441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686991.

The product of its digits is 2408448, while the sum is 50.

The spelling of 221467478441 in words is "two hundred twenty-one billion, four hundred sixty-seven million, four hundred seventy-eight thousand, four hundred forty-one".