23155 has 8 divisors (see below), whose sum is σ = 30384. Its totient is φ = 16800.

The previous prime is 23143. The next prime is 23159. The reversal of 23155 is 55132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23155 - 2⁷ = 23027 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (23159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156 + ... + 265.

It is an arithmetic number, because the mean of its divisors is an integer number (3798).

2²³¹⁵⁵ is an apocalyptic number.

23155 is a deficient number, since it is larger than the sum of its proper divisors (7229).

23155 is a wasteful number, since it uses less digits than its factorization.

23155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437.

The product of its digits is 150, while the sum is 16.

The square root of 23155 is about 152.1676706794. The cubic root of 23155 is about 28.5024107943.

Subtracting from 23155 its product of digits (150), we obtain a triangular number (23005 = T₂₁₄).

Adding to 23155 its reverse (55132), we get a palindrome (78287).

The spelling of 23155 in words is "twenty-three thousand, one hundred fifty-five".