52521454520 has 128 divisors (see below), whose sum is σ = 127750348800. Its totient is φ = 19371695616.

The previous prime is 52521454487. The next prime is 52521454543. The reversal of 52521454520 is 2545412525.

52521454520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5110427 + ... + 5120693.

It is an arithmetic number, because the mean of its divisors is an integer number (998049600).

Almost surely, 2^52521454520 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 52521454520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63875174400).

52521454520 is an abundant number, since it is smaller than the sum of its proper divisors (75228894280).

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

52521454520 is a wasteful number, since it uses less digits than its factorization.

52521454520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10477 (or 10473 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 35.

The spelling of 52521454520 in words is "fifty-two billion, five hundred twenty-one million, four hundred fifty-four thousand, five hundred twenty".