23121224 has 64 divisors (see below), whose sum is σ = 53136000. Its totient is φ = 9206784.

The previous prime is 23121209. The next prime is 23121247. The reversal of 23121224 is 42212132.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141767 + ... + 141929.

It is an arithmetic number, because the mean of its divisors is an integer number (830250).

Almost surely, 2^23121224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23121224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26568000).

23121224 is an abundant number, since it is smaller than the sum of its proper divisors (30014776).

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

23121224 is a wasteful number, since it uses less digits than its factorization.

23121224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 338 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 23121224 is about 4808.4533896046. The cubic root of 23121224 is about 284.8854530955.

Adding to 23121224 its reverse (42212132), we get a palindrome (65333356).

The spelling of 23121224 in words is "twenty-three million, one hundred twenty-one thousand, two hundred twenty-four".