441405221 has 16 divisors (see below), whose sum is σ = 479990448. Its totient is φ = 404275200.

The previous prime is 441405157. The next prime is 441405241. The reversal of 441405221 is 122504144.

It can be written as a sum of positive squares in 8 ways, for example, as 11464996 + 429940225 = 3386^2 + 20735^2 .

It is a cyclic number.

It is not a de Polignac number, because 441405221 - 2⁶ = 441405157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441405241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468611 + ... + 469551.

It is an arithmetic number, because the mean of its divisors is an integer number (29999403).

Almost surely, 2^441405221 is an apocalyptic number.

441405221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

441405221 is a deficient number, since it is larger than the sum of its proper divisors (38585227).

441405221 is a wasteful number, since it uses less digits than its factorization.

441405221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 441405221 is about 21009.6459037272. The cubic root of 441405221 is about 761.3993269596.

Adding to 441405221 its reverse (122504144), we get a palindrome (563909365).

The spelling of 441405221 in words is "four hundred forty-one million, four hundred five thousand, two hundred twenty-one".