23043155 has 4 divisors (see below), whose sum is σ = 27651792. Its totient is φ = 18434520.

The previous prime is 23043151. The next prime is 23043157. The reversal of 23043155 is 55134032.

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

It is not a de Polignac number, because 23043155 - 2² = 23043151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23043155.

It is not an unprimeable number, because it can be changed into a prime (23043151) 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, 2304311 + ... + 2304320.

It is an arithmetic number, because the mean of its divisors is an integer number (6912948).

Almost surely, 2^23043155 is an apocalyptic number.

23043155 is a deficient number, since it is larger than the sum of its proper divisors (4608637).

23043155 is an equidigital number, since it uses as much as digits as its factorization.

23043155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4608636.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 23043155 is about 4800.3286345833. The cubic root of 23043155 is about 284.5644521904.

Adding to 23043155 its reverse (55134032), we get a palindrome (78177187).

The spelling of 23043155 in words is "twenty-three million, forty-three thousand, one hundred fifty-five".