221443165546441 has 4 divisors (see below), whose sum is σ = 221444218288384. Its totient is φ = 221442112804500.

The previous prime is 221443165546439. The next prime is 221443165546483. The reversal of 221443165546441 is 144645561344122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221443165546441 - 2¹ = 221443165546439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221443165546411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526055385 + ... + 526476166.

It is an arithmetic number, because the mean of its divisors is an integer number (55361054572096).

Almost surely, 2^{221443165546441} is an apocalyptic number.

It is an amenable number.

221443165546441 is a deficient number, since it is larger than the sum of its proper divisors (1052741943).

221443165546441 is a wasteful number, since it uses less digits than its factorization.

221443165546441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052741942.

The product of its digits is 11059200, while the sum is 52.

The spelling of 221443165546441 in words is "two hundred twenty-one trillion, four hundred forty-three billion, one hundred sixty-five million, five hundred forty-six thousand, four hundred forty-one".