23121152 has 36 divisors (see below), whose sum is σ = 47418756. Its totient is φ = 11243520.

The previous prime is 23121127. The next prime is 23121181. The reversal of 23121152 is 25112132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11397376 + 11723776 = 3376^2 + 3424^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23121152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8252 + ... + 10692.

Almost surely, 2^23121152 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 23121152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23709378).

23121152 is an abundant number, since it is smaller than the sum of its proper divisors (24297604).

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

23121152 is an equidigital number, since it uses as much as digits as its factorization.

23121152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494 (or 2480 counting only the distinct ones).

The product of its digits is 120, while the sum is 17.

The square root of 23121152 is about 4808.4459027840. The cubic root of 23121152 is about 284.8851573820.

Adding to 23121152 its reverse (25112132), we get a palindrome (48233284).

It can be divided in two parts, 2312 and 1152, that multiplied together give a square (2663424 = 1632²).

The spelling of 23121152 in words is "twenty-three million, one hundred twenty-one thousand, one hundred fifty-two".