23040513 has 6 divisors (see below), whose sum is σ = 33280754. Its totient is φ = 15360336.

The previous prime is 23040497. The next prime is 23040541. The reversal of 23040513 is 31504032.

It can be written as a sum of positive squares in only one way, i.e., 14379264 + 8661249 = 3792^2 + 2943^2 .

It is not a de Polignac number, because 23040513 - 2⁴ = 23040497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23040553) 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 5 ways as a sum of consecutive naturals, for example, 1280020 + ... + 1280037.

Almost surely, 2^23040513 is an apocalyptic number.

It is an amenable number.

23040513 is a deficient number, since it is larger than the sum of its proper divisors (10240241).

23040513 is a wasteful number, since it uses less digits than its factorization.

23040513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560063 (or 2560060 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 23040513 is about 4800.0534372025. The cubic root of 23040513 is about 284.5535762489.

Adding to 23040513 its reverse (31504032), we get a palindrome (54544545).

The spelling of 23040513 in words is "twenty-three million, forty thousand, five hundred thirteen".