53351551521 has 12 divisors (see below), whose sum is σ = 79549267200. Its totient is φ = 34420355640.

The previous prime is 53351551501. The next prime is 53351551523. The reversal of 53351551521 is 12515515335.

53351551521 is a `hidden beast` number, since 5 + 3 + 3 + 51 + 551 + 52 + 1 = 666.

It is not a de Polignac number, because 53351551521 - 2³³ = 44761616929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53351551523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95611821 + ... + 95612378.

It is an arithmetic number, because the mean of its divisors is an integer number (6629105600).

Almost surely, 2^53351551521 is an apocalyptic number.

It is an amenable number.

53351551521 is a deficient number, since it is larger than the sum of its proper divisors (26197715679).

53351551521 is a wasteful number, since it uses less digits than its factorization.

53351551521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191224236 (or 191224233 counting only the distinct ones).

The product of its digits is 56250, while the sum is 36.

The spelling of 53351551521 in words is "fifty-three billion, three hundred fifty-one million, five hundred fifty-one thousand, five hundred twenty-one".