40444420221 has 12 divisors (see below), whose sum is σ = 59291655072. Its totient is φ = 26560514376.

The previous prime is 40444420207. The next prime is 40444420223. The reversal of 40444420221 is 12202444404.

It is not a de Polignac number, because 40444420221 - 2⁵ = 40444420189 is a prime.

It is a super-2 number, since 2×40444420221² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40444420223) 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 11 ways as a sum of consecutive naturals, for example, 33535401 + ... + 33536606.

It is an arithmetic number, because the mean of its divisors is an integer number (4940971256).

Almost surely, 2^40444420221 is an apocalyptic number.

It is an amenable number.

40444420221 is a deficient number, since it is larger than the sum of its proper divisors (18847234851).

40444420221 is a wasteful number, since it uses less digits than its factorization.

40444420221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67072080 (or 67072077 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 40444420221 its reverse (12202444404), we get a palindrome (52646864625).

The spelling of 40444420221 in words is "forty billion, four hundred forty-four million, four hundred twenty thousand, two hundred twenty-one".