33545 has 4 divisors (see below), whose sum is σ = 40260. Its totient is φ = 26832.

The previous prime is 33533. The next prime is 33547. The reversal of 33545 is 54533.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54533 = 23 ⋅2371.

It can be written as a sum of positive squares in 2 ways, for example, as 17161 + 16384 = 131^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 33545 - 2⁴ = 33529 is a prime.

It is a super-2 number, since 2×33545² = 2250534050, which contains 22 as substring.

It is an Ulam number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (33547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3350 + ... + 3359.

It is an arithmetic number, because the mean of its divisors is an integer number (10065).

2³³⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

33545 is a deficient number, since it is larger than the sum of its proper divisors (6715).

33545 is an equidigital number, since it uses as much as digits as its factorization.

33545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6714.

The product of its digits is 900, while the sum is 20.

The square root of 33545 is about 183.1529415543. The cubic root of 33545 is about 32.2509564446.

The spelling of 33545 in words is "thirty-three thousand, five hundred forty-five".