440522213221 has 4 divisors (see below), whose sum is σ = 445471901100. Its totient is φ = 435572525344.

The previous prime is 440522213207. The next prime is 440522213233. The reversal of 440522213221 is 122312225044.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27473062500 + 413049150721 = 165750^2 + 642689^2 .

It is a cyclic number.

It is not a de Polignac number, because 440522213221 - 2⁵ = 440522213189 is a prime.

It is a super-2 number, since 2×440522213221² (a number of 24 digits) contains 22 as substring.

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 440522213221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440522213921) by changing a digit.

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, 2474843806 + ... + 2474843983.

It is an arithmetic number, because the mean of its divisors is an integer number (111367975275).

Almost surely, 2^440522213221 is an apocalyptic number.

It is an amenable number.

440522213221 is a deficient number, since it is larger than the sum of its proper divisors (4949687879).

440522213221 is an equidigital number, since it uses as much as digits as its factorization.

440522213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4949687878.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 440522213221 its reverse (122312225044), we get a palindrome (562834438265).

The spelling of 440522213221 in words is "four hundred forty billion, five hundred twenty-two million, two hundred thirteen thousand, two hundred twenty-one".