155885 has 4 divisors (see below), whose sum is σ = 187068. Its totient is φ = 124704.

The previous prime is 155863. The next prime is 155887. The reversal of 155885 is 588551.

155885 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: 588551 = 409 ⋅1439.

It can be written as a sum of positive squares in 2 ways, for example, as 88804 + 67081 = 298^2 + 259^2 .

It is a cyclic number.

It is not a de Polignac number, because 155885 - 2⁶ = 155821 is a prime.

It is a super-3 number, since 3×155885³ = 11364078803337375, which contains 333 as substring.

It is a Duffinian number.

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 155885.

It is not an unprimeable number, because it can be changed into a prime (155887) 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, 15584 + ... + 15593.

It is an arithmetic number, because the mean of its divisors is an integer number (46767).

2¹⁵⁵⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

155885 is a deficient number, since it is larger than the sum of its proper divisors (31183).

155885 is an equidigital number, since it uses as much as digits as its factorization.

155885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31182.

The product of its digits is 8000, while the sum is 32.

The square root of 155885 is about 394.8227450388. The cubic root of 155885 is about 53.8188948894.

The spelling of 155885 in words is "one hundred fifty-five thousand, eight hundred eighty-five".