23813145 has 12 divisors (see below), whose sum is σ = 41276196. Its totient is φ = 12700320.

The previous prime is 23813143. The next prime is 23813149. The reversal of 23813145 is 54131832.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15116544 + 8696601 = 3888^2 + 2949^2 .

It is not a de Polignac number, because 23813145 - 2¹ = 23813143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23813143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264546 + ... + 264635.

It is an arithmetic number, because the mean of its divisors is an integer number (3439683).

Almost surely, 2^23813145 is an apocalyptic number.

It is an amenable number.

23813145 is a deficient number, since it is larger than the sum of its proper divisors (17463051).

23813145 is a wasteful number, since it uses less digits than its factorization.

23813145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529192 (or 529189 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 23813145 is about 4879.8714122403. The cubic root of 23813145 is about 287.6993752530.

Adding to 23813145 its reverse (54131832), we get a palindrome (77944977).

The spelling of 23813145 in words is "twenty-three million, eight hundred thirteen thousand, one hundred forty-five".