23163505 has 4 divisors (see below), whose sum is σ = 27796212. Its totient is φ = 18530800.

The previous prime is 23163499. The next prime is 23163521. The reversal of 23163505 is 50536132.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17631601 + 5531904 = 4199^2 + 2352^2 .

It is not a de Polignac number, because 23163505 - 2¹³ = 23155313 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 23163505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2316346 + ... + 2316355.

It is an arithmetic number, because the mean of its divisors is an integer number (6949053).

Almost surely, 2^23163505 is an apocalyptic number.

It is an amenable number.

23163505 is a deficient number, since it is larger than the sum of its proper divisors (4632707).

23163505 is an equidigital number, since it uses as much as digits as its factorization.

23163505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4632706.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 23163505 is about 4812.8479095022. The cubic root of 23163505 is about 285.0590008144.

Adding to 23163505 its reverse (50536132), we get a palindrome (73699637).

It can be divided in two parts, 231 and 63505, that added together give a palindrome (63736).

The spelling of 23163505 in words is "twenty-three million, one hundred sixty-three thousand, five hundred five".