23455 has 4 divisors (see below), whose sum is σ = 28152. Its totient is φ = 18760.

The previous prime is 23447. The next prime is 23459. The reversal of 23455 is 55432.

23455 = 60² + 61² + ... + 65².

It is a happy number.

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

It is not a de Polignac number, because 23455 - 2³ = 23447 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2341 + ... + 2350.

It is an arithmetic number, because the mean of its divisors is an integer number (7038).

2²³⁴⁵⁵ is an apocalyptic number.

23455 is a deficient number, since it is larger than the sum of its proper divisors (4697).

23455 is an equidigital number, since it uses as much as digits as its factorization.

23455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4696.

The product of its digits is 600, while the sum is 19.

The square root of 23455 is about 153.1502530197. The cubic root of 23455 is about 28.6249769582.

Subtracting from 23455 its sum of digits (19), we obtain a triangular number (23436 = T₂₁₆).

Adding to 23455 its reverse (55432), we get a palindrome (78887).

It can be divided in two parts, 234 and 55, that added together give a square (289 = 17²).

The spelling of 23455 in words is "twenty-three thousand, four hundred fifty-five".