23281504 has 24 divisors (see below), whose sum is σ = 46590768. Its totient is φ = 11448960.

The previous prime is 23281501. The next prime is 23281553. The reversal of 23281504 is 40518232.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4012 + ... + 7915.

It is an arithmetic number, because the mean of its divisors is an integer number (1941282).

Almost surely, 2^23281504 is an apocalyptic number.

It is an amenable number.

23281504 is an abundant number, since it is smaller than the sum of its proper divisors (23309264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23281504 is a wasteful number, since it uses less digits than its factorization.

23281504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11998 (or 11990 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 23281504 is about 4825.0910872231. The cubic root of 23281504 is about 285.5422282171.

Adding to 23281504 its reverse (40518232), we get a palindrome (63799736).

The spelling of 23281504 in words is "twenty-three million, two hundred eighty-one thousand, five hundred four".