53221518481560 has 256 divisors, whose sum is σ = 187699599682560. Its totient is φ = 11901985966080.

The previous prime is 53221518481553. The next prime is 53221518481561. The reversal of 53221518481560 is 6518481512235.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53221518481561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25472862 + ... + 27482898.

It is an arithmetic number, because the mean of its divisors is an integer number (733201561260).

Almost surely, 2^{53221518481560} 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 53221518481560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93849799841280).

53221518481560 is an abundant number, since it is smaller than the sum of its proper divisors (134478081201000).

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

53221518481560 is a wasteful number, since it uses less digits than its factorization.

53221518481560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011618 (or 2011614 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 51.

Adding to 53221518481560 its reverse (6518481512235), we get a palindrome (59739999993795).

The spelling of 53221518481560 in words is "fifty-three trillion, two hundred twenty-one billion, five hundred eighteen million, four hundred eighty-one thousand, five hundred sixty".