441400221 has 24 divisors (see below), whose sum is σ = 648608480. Its totient is φ = 289197216.

The previous prime is 441400151. The next prime is 441400247. The reversal of 441400221 is 122004144.

441400221 is a `hidden beast` number, since 4 + 41 + 400 + 221 = 666.

It is not a de Polignac number, because 441400221 - 2¹⁰ = 441399197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 441400194 and 441400203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441400321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 499446 + ... + 500328.

Almost surely, 2^441400221 is an apocalyptic number.

It is an amenable number.

441400221 is a deficient number, since it is larger than the sum of its proper divisors (207208259).

441400221 is a wasteful number, since it uses less digits than its factorization.

441400221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785 (or 1782 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 441400221 is about 21009.5269104280. The cubic root of 441400221 is about 761.3964520419.

Adding to 441400221 its reverse (122004144), we get a palindrome (563404365).

The spelling of 441400221 in words is "four hundred forty-one million, four hundred thousand, two hundred twenty-one".