23121056 has 48 divisors (see below), whose sum is σ = 52363584. Its totient is φ = 9844224.

The previous prime is 23121053. The next prime is 23121073. The reversal of 23121056 is 65012132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51971 + ... + 52413.

It is an arithmetic number, because the mean of its divisors is an integer number (1090908).

Almost surely, 2^23121056 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 23121056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26181792).

23121056 is an abundant number, since it is smaller than the sum of its proper divisors (29242528).

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

23121056 is a wasteful number, since it uses less digits than its factorization.

23121056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 23121056 is about 4808.4359203383. The cubic root of 23121056 is about 284.8847630964.

Adding to 23121056 its reverse (65012132), we get a palindrome (88133188).

The spelling of 23121056 in words is "twenty-three million, one hundred twenty-one thousand, fifty-six".