53581521 has 8 divisors (see below), whose sum is σ = 81648064. Its totient is φ = 30618000.

The previous prime is 53581519. The next prime is 53581529. The reversal of 53581521 is 12518535.

53581521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53581521 - 2¹ = 53581519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53581529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275730 + ... + 1275771.

It is an arithmetic number, because the mean of its divisors is an integer number (10206008).

Almost surely, 2^53581521 is an apocalyptic number.

It is an amenable number.

53581521 is a deficient number, since it is larger than the sum of its proper divisors (28066543).

53581521 is a wasteful number, since it uses less digits than its factorization.

53581521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551511.

The product of its digits is 6000, while the sum is 30.

The square root of 53581521 is about 7319.9399587702. The cubic root of 53581521 is about 376.9973920225.

The spelling of 53581521 in words is "fifty-three million, five hundred eighty-one thousand, five hundred twenty-one".