16441285221 has 6 divisors (see below), whose sum is σ = 23748523110. Its totient is φ = 10960856808.

The previous prime is 16441285207. The next prime is 16441285229. The reversal of 16441285221 is 12258214461.

16441285221 is a `hidden beast` number, since 1 + 6 + 4 + 4 + 128 + 522 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12457908225 + 3983376996 = 111615^2 + 63114^2 .

It is not a de Polignac number, because 16441285221 - 2¹⁸ = 16441023077 is a prime.

It is a super-3 number, since 3×16441285221³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16441285229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 913404726 + ... + 913404743.

It is an arithmetic number, because the mean of its divisors is an integer number (3958087185).

Almost surely, 2^16441285221 is an apocalyptic number.

It is an amenable number.

16441285221 is a deficient number, since it is larger than the sum of its proper divisors (7307237889).

16441285221 is a wasteful number, since it uses less digits than its factorization.

16441285221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826809475 (or 1826809472 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

Adding to 16441285221 its reverse (12258214461), we get a palindrome (28699499682).

The spelling of 16441285221 in words is "sixteen billion, four hundred forty-one million, two hundred eighty-five thousand, two hundred twenty-one".