521343105245344 has 96 divisors (see below), whose sum is σ = 1063346263358400. Its totient is φ = 251313488025600.

The previous prime is 521343105245327. The next prime is 521343105245447. The reversal of 521343105245344 is 443542501343125.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 521343105245294 and 521343105245303.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2667970044 + ... + 2668165444.

It is an arithmetic number, because the mean of its divisors is an integer number (11076523576650).

Almost surely, 2^{521343105245344} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521343105245344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (531673131679200).

521343105245344 is an abundant number, since it is smaller than the sum of its proper divisors (542003158113056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521343105245344 is a wasteful number, since it uses less digits than its factorization.

521343105245344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199646 (or 199638 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 46.

Adding to 521343105245344 its reverse (443542501343125), we get a palindrome (964885606588469).

The spelling of 521343105245344 in words is "five hundred twenty-one trillion, three hundred forty-three billion, one hundred five million, two hundred forty-five thousand, three hundred forty-four".