23145530 has 32 divisors (see below), whose sum is σ = 43338240. Its totient is φ = 8890560.

The previous prime is 23145527. The next prime is 23145533. The reversal of 23145530 is 3554132.

It is an interprime number because it is at equal distance from previous prime (23145527) and next prime (23145533).

It is a junction number, because it is equal to n+sod(n) for n = 23145496 and 23145505.

It is not an unprimeable number, because it can be changed into a prime (23145533) 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 15 ways as a sum of consecutive naturals, for example, 60881 + ... + 61259.

It is an arithmetic number, because the mean of its divisors is an integer number (1354320).

Almost surely, 2^23145530 is an apocalyptic number.

23145530 is a deficient number, since it is larger than the sum of its proper divisors (20192710).

23145530 is a wasteful number, since it uses less digits than its factorization.

23145530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 23145530 is about 4810.9801496161. The cubic root of 23145530 is about 284.9852459788.

Adding to 23145530 its reverse (3554132), we get a palindrome (26699662).

The spelling of 23145530 in words is "twenty-three million, one hundred forty-five thousand, five hundred thirty".