53545 has 4 divisors (see below), whose sum is σ = 64260. Its totient is φ = 42832.

The previous prime is 53527. The next prime is 53549. The reversal of 53545 is 54535.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38416 + 15129 = 196^2 + 123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53545 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (53549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5350 + ... + 5359.

It is an arithmetic number, because the mean of its divisors is an integer number (16065).

2⁵³⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

53545 is a deficient number, since it is larger than the sum of its proper divisors (10715).

53545 is a wasteful number, since it uses less digits than its factorization.

53545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10714.

The product of its digits is 1500, while the sum is 22.

The square root of 53545 is about 231.3979256605. The cubic root of 53545 is about 37.6911719134.

Subtracting 53545 from its reverse (54535), we obtain a triangular number (990 = T₄₄).

The spelling of 53545 in words is "fifty-three thousand, five hundred forty-five".