53553251521 has 16 divisors (see below), whose sum is σ = 66779856000. Its totient is φ = 41722202880.

The previous prime is 53553251519. The next prime is 53553251527. The reversal of 53553251521 is 12515235535.

It is a cyclic number.

It is not a de Polignac number, because 53553251521 - 2¹ = 53553251519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53553251527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382185 + ... + 503161.

It is an arithmetic number, because the mean of its divisors is an integer number (4173741000).

Almost surely, 2^53553251521 is an apocalyptic number.

It is an amenable number.

53553251521 is a deficient number, since it is larger than the sum of its proper divisors (13226604479).

53553251521 is a wasteful number, since it uses less digits than its factorization.

53553251521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126744.

The product of its digits is 112500, while the sum is 37.

The spelling of 53553251521 in words is "fifty-three billion, five hundred fifty-three million, two hundred fifty-one thousand, five hundred twenty-one".