24155 has 4 divisors (see below), whose sum is σ = 28992. Its totient is φ = 19320.

The previous prime is 24151. The next prime is 24169. The reversal of 24155 is 55142.

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

It is not a de Polignac number, because 24155 - 2² = 24151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24151) 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, 2411 + ... + 2420.

It is an arithmetic number, because the mean of its divisors is an integer number (7248).

2²⁴¹⁵⁵ is an apocalyptic number.

24155 is a deficient number, since it is larger than the sum of its proper divisors (4837).

24155 is an equidigital number, since it uses as much as digits as its factorization.

24155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836.

The product of its digits is 200, while the sum is 17.

The square root of 24155 is about 155.4187890829. The cubic root of 24155 is about 28.9069550595.

Adding to 24155 its reverse (55142), we get a palindrome (79297).

The spelling of 24155 in words is "twenty-four thousand, one hundred fifty-five".