23281503 has 16 divisors (see below), whose sum is σ = 35794176. Its totient is φ = 13184640.

The previous prime is 23281501. The next prime is 23281553. The reversal of 23281503 is 30518232.

It is not a de Polignac number, because 23281503 - 2¹ = 23281501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23281501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2533 + ... + 7278.

It is an arithmetic number, because the mean of its divisors is an integer number (2237136).

Almost surely, 2^23281503 is an apocalyptic number.

23281503 is a deficient number, since it is larger than the sum of its proper divisors (12512673).

23281503 is a wasteful number, since it uses less digits than its factorization.

23281503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9934.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 23281503 is about 4825.0909835981. The cubic root of 23281503 is about 285.5422241288.

Adding to 23281503 its reverse (30518232), we get a palindrome (53799735).

The spelling of 23281503 in words is "twenty-three million, two hundred eighty-one thousand, five hundred three".