53513521520 has 20 divisors (see below), whose sum is σ = 124418937720. Its totient is φ = 21405408576.

The previous prime is 53513521517. The next prime is 53513521549. The reversal of 53513521520 is 2512531535.

53513521520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×53513521520² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334459430 + ... + 334459589.

It is an arithmetic number, because the mean of its divisors is an integer number (6220946886).

Almost surely, 2^53513521520 is an apocalyptic number.

It is an amenable number.

53513521520 is an abundant number, since it is smaller than the sum of its proper divisors (70905416200).

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

53513521520 is a wasteful number, since it uses less digits than its factorization.

53513521520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668919032 (or 668919026 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

It can be divided in two parts, 535135 and 21520, that added together give a palindrome (556655).

The spelling of 53513521520 in words is "fifty-three billion, five hundred thirteen million, five hundred twenty-one thousand, five hundred twenty".