43655 has 4 divisors (see below), whose sum is σ = 52392. Its totient is φ = 34920.

The previous prime is 43651. The next prime is 43661. The reversal of 43655 is 55634.

43655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55634 = 2 ⋅27817.

It is not a de Polignac number, because 43655 - 2² = 43651 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 43655.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 43655.

It is not an unprimeable number, because it can be changed into a prime (43651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4361 + ... + 4370.

It is an arithmetic number, because the mean of its divisors is an integer number (13098).

2⁴³⁶⁵⁵ is an apocalyptic number.

43655 is a deficient number, since it is larger than the sum of its proper divisors (8737).

43655 is an equidigital number, since it uses as much as digits as its factorization.

43655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8736.

The product of its digits is 1800, while the sum is 23.

The square root of 43655 is about 208.9377897844. The cubic root of 43655 is about 35.2109706679.

The spelling of 43655 in words is "forty-three thousand, six hundred fifty-five".