4431442545521 has 16 divisors (see below), whose sum is σ = 4733439353280. Its totient is φ = 4134111421440.

The previous prime is 4431442545499. The next prime is 4431442545547. The reversal of 4431442545521 is 1255452441344.

It is a cyclic number.

It is not a de Polignac number, because 4431442545521 - 2¹⁸ = 4431442283377 is a prime.

It is a super-2 number, since 2×4431442545521² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4431442545421) 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, 754745 + ... + 3071241.

It is an arithmetic number, because the mean of its divisors is an integer number (295839959580).

Almost surely, 2^{4431442545521} is an apocalyptic number.

It is an amenable number.

4431442545521 is a deficient number, since it is larger than the sum of its proper divisors (301996807759).

4431442545521 is a wasteful number, since it uses less digits than its factorization.

4431442545521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317504.

The product of its digits is 1536000, while the sum is 44.

Adding to 4431442545521 its reverse (1255452441344), we get a palindrome (5686894986865).

The spelling of 4431442545521 in words is "four trillion, four hundred thirty-one billion, four hundred forty-two million, five hundred forty-five thousand, five hundred twenty-one".