521334406541 has 8 divisors (see below), whose sum is σ = 570640940184. Its totient is φ = 473342713920.

The previous prime is 521334406517. The next prime is 521334406543. The reversal of 521334406541 is 145604433125.

It can be written as a sum of positive squares in 4 ways, for example, as 56965755625 + 464368650916 = 238675^2 + 681446^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 521334406541 - 2⁶ = 521334406477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521334406495 and 521334406504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521334406543) 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, 328709426 + ... + 328711011.

It is an arithmetic number, because the mean of its divisors is an integer number (71330117523).

Almost surely, 2^521334406541 is an apocalyptic number.

It is an amenable number.

521334406541 is a deficient number, since it is larger than the sum of its proper divisors (49306533643).

521334406541 is a wasteful number, since it uses less digits than its factorization.

521334406541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657420511.

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 521334406541 its reverse (145604433125), we get a palindrome (666938839666).

The spelling of 521334406541 in words is "five hundred twenty-one billion, three hundred thirty-four million, four hundred six thousand, five hundred forty-one".