221445043466 has 8 divisors (see below), whose sum is σ = 332186481540. Its totient is φ = 110716216288.

The previous prime is 221445043429. The next prime is 221445043481. The reversal of 221445043466 is 664340544122.

221445043466 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 208862710225 + 12582333241 = 457015^2 + 112171^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3108701 + ... + 3179136.

Almost surely, 2^221445043466 is an apocalyptic number.

221445043466 is a deficient number, since it is larger than the sum of its proper divisors (110741438074).

221445043466 is a wasteful number, since it uses less digits than its factorization.

221445043466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6305448.

The product of its (nonzero) digits is 552960, while the sum is 41.

Adding to 221445043466 its reverse (664340544122), we get a palindrome (885785587588).

The spelling of 221445043466 in words is "two hundred twenty-one billion, four hundred forty-five million, forty-three thousand, four hundred sixty-six".