544445521 has 8 divisors (see below), whose sum is σ = 555810984. Its totient is φ = 533120640.

The previous prime is 544445501. The next prime is 544445527. The reversal of 544445521 is 125544445.

It can be written as a sum of positive squares in 4 ways, for example, as 9217296 + 535228225 = 3036^2 + 23135^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-544445521 is a prime.

It is a super-2 number, since 2×544445521² = 592841850673922882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (544445527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17755 + ... + 37471.

It is an arithmetic number, because the mean of its divisors is an integer number (69476373).

Almost surely, 2^544445521 is an apocalyptic number.

It is an amenable number.

544445521 is a deficient number, since it is larger than the sum of its proper divisors (11365463).

544445521 is a wasteful number, since it uses less digits than its factorization.

544445521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20291.

The product of its digits is 64000, while the sum is 34.

The square root of 544445521 is about 23333.3564023695. The cubic root of 544445521 is about 816.5538104404.

Adding to 544445521 its reverse (125544445), we get a palindrome (669989966).

The spelling of 544445521 in words is "five hundred forty-four million, four hundred forty-five thousand, five hundred twenty-one".