53003521 has 8 divisors (see below), whose sum is σ = 57593600. Its totient is φ = 48593520.

The previous prime is 53003507. The next prime is 53003527. The reversal of 53003521 is 12530035.

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

It is a cyclic number.

It is not a de Polignac number, because 53003521 - 2⁹ = 53003009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53003527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44406 + ... + 45583.

It is an arithmetic number, because the mean of its divisors is an integer number (7199200).

Almost surely, 2^53003521 is an apocalyptic number.

It is an amenable number.

53003521 is a deficient number, since it is larger than the sum of its proper divisors (4590079).

53003521 is a wasteful number, since it uses less digits than its factorization.

53003521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90039.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 53003521 is about 7280.3517085372. The cubic root of 53003521 is about 375.6368934028.

Adding to 53003521 its reverse (12530035), we get a palindrome (65533556).

The spelling of 53003521 in words is "fifty-three million, three thousand, five hundred twenty-one".