23135155 has 4 divisors (see below), whose sum is σ = 27762192. Its totient is φ = 18508120.

The previous prime is 23135153. The next prime is 23135191. The reversal of 23135155 is 55153132.

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

It is not a de Polignac number, because 23135155 - 2¹ = 23135153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23135153) 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, 2313511 + ... + 2313520.

It is an arithmetic number, because the mean of its divisors is an integer number (6940548).

Almost surely, 2^23135155 is an apocalyptic number.

23135155 is a deficient number, since it is larger than the sum of its proper divisors (4627037).

23135155 is an equidigital number, since it uses as much as digits as its factorization.

23135155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4627036.

The product of its digits is 2250, while the sum is 25.

The square root of 23135155 is about 4809.9017661487. The cubic root of 23135155 is about 284.9426580029.

Adding to 23135155 its reverse (55153132), we get a palindrome (78288287).

The spelling of 23135155 in words is "twenty-three million, one hundred thirty-five thousand, one hundred fifty-five".