53135521 has 16 divisors (see below), whose sum is σ = 56173824. Its totient is φ = 50212864.

The previous prime is 53135507. The next prime is 53135527. The reversal of 53135521 is 12553135.

It is a cyclic number.

It is not a de Polignac number, because 53135521 - 2⁹ = 53135009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53135527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206625 + ... + 206881.

It is an arithmetic number, because the mean of its divisors is an integer number (3510864).

Almost surely, 2^53135521 is an apocalyptic number.

It is an amenable number.

53135521 is a deficient number, since it is larger than the sum of its proper divisors (3038303).

53135521 is a wasteful number, since it uses less digits than its factorization.

53135521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440.

The product of its digits is 2250, while the sum is 25.

The square root of 53135521 is about 7289.4115674724. The cubic root of 53135521 is about 375.9484636812.

Adding to 53135521 its reverse (12553135), we get a palindrome (65688656).

The spelling of 53135521 in words is "fifty-three million, one hundred thirty-five thousand, five hundred twenty-one".