43855 has 12 divisors (see below), whose sum is σ = 61560. Its totient is φ = 29904.

The previous prime is 43853. The next prime is 43867. The reversal of 43855 is 55834.

It is a happy number.

It is not a de Polignac number, because 43855 - 2¹ = 43853 is a prime.

It is a super-2 number, since 2×43855² = 3846522050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156 + ... + 334.

It is an arithmetic number, because the mean of its divisors is an integer number (5130).

2⁴³⁸⁵⁵ is an apocalyptic number.

43855 is a deficient number, since it is larger than the sum of its proper divisors (17705).

43855 is a wasteful number, since it uses less digits than its factorization.

43855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 191 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 43855 is about 209.4158542231. The cubic root of 43855 is about 35.2646603339.

It can be divided in two parts, 438 and 55, that multiplied together give a triangular number (24090 = T₂₁₉).

The spelling of 43855 in words is "forty-three thousand, eight hundred fifty-five".