23040505 has 4 divisors (see below), whose sum is σ = 27648612. Its totient is φ = 18432400.

The previous prime is 23040497. The next prime is 23040541. The reversal of 23040505 is 50504032.

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 3139984 + 19900521 = 1772^2 + 4461^2 .

It is not a de Polignac number, because 23040505 - 2³ = 23040497 is a prime.

It is a Duffinian number.

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, 2304046 + ... + 2304055.

It is an arithmetic number, because the mean of its divisors is an integer number (6912153).

Almost surely, 2^23040505 is an apocalyptic number.

It is an amenable number.

23040505 is a deficient number, since it is larger than the sum of its proper divisors (4608107).

23040505 is an equidigital number, since it uses as much as digits as its factorization.

23040505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608106.

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

The square root of 23040505 is about 4800.0526038784. The cubic root of 23040505 is about 284.5535433152.

Adding to 23040505 its reverse (50504032), we get a palindrome (73544537).

The spelling of 23040505 in words is "twenty-three million, forty thousand, five hundred five".