53557533 has 6 divisors (see below), whose sum is σ = 77360894. Its totient is φ = 35705016.

The previous prime is 53557529. The next prime is 53557541. The reversal of 53557533 is 33575535.

It is a happy number.

53557533 is a `hidden beast` number, since 53 + 5 + 575 + 33 = 666.

53557533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 53538489 + 19044 = 7317^2 + 138^2 .

It is not a de Polignac number, because 53557533 - 2² = 53557529 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53557033) 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 5 ways as a sum of consecutive naturals, for example, 2975410 + ... + 2975427.

Almost surely, 2^53557533 is an apocalyptic number.

It is an amenable number.

53557533 is a deficient number, since it is larger than the sum of its proper divisors (23803361).

53557533 is a wasteful number, since it uses less digits than its factorization.

53557533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5950843 (or 5950840 counting only the distinct ones).

The product of its digits is 118125, while the sum is 36.

The square root of 53557533 is about 7318.3012373091. The cubic root of 53557533 is about 376.9411240956.

The spelling of 53557533 in words is "fifty-three million, five hundred fifty-seven thousand, five hundred thirty-three".