221043401 has 8 divisors (see below), whose sum is σ = 234982944. Its totient is φ = 207208000.

The previous prime is 221043391. The next prime is 221043421. The reversal of 221043401 is 104340122.

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

It is a cyclic number.

It is not a de Polignac number, because 221043401 - 2¹⁰ = 221042377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221043401.

It is not an unprimeable number, because it can be changed into a prime (221043421) 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, 21635 + ... + 30168.

It is an arithmetic number, because the mean of its divisors is an integer number (29372868).

Almost surely, 2^221043401 is an apocalyptic number.

It is an amenable number.

221043401 is a deficient number, since it is larger than the sum of its proper divisors (13939543).

221043401 is a wasteful number, since it uses less digits than its factorization.

221043401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52071.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 221043401 is about 14867.5284092548. The cubic root of 221043401 is about 604.6339346876.

Adding to 221043401 its reverse (104340122), we get a palindrome (325383523).

The spelling of 221043401 in words is "two hundred twenty-one million, forty-three thousand, four hundred one".