22751232 has 144 divisors (see below), whose sum is σ = 72465120. Its totient is φ = 6217728.

The previous prime is 22751191. The next prime is 22751233. The reversal of 22751232 is 23215722.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

Its product of digits (1680) is a multiple of the sum of its prime divisors (35).

It is not an unprimeable number, because it can be changed into a prime (22751233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 989173 + ... + 989195.

It is an arithmetic number, because the mean of its divisors is an integer number (503230).

Almost surely, 2^22751232 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 22751232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36232560).

22751232 is an abundant number, since it is smaller than the sum of its proper divisors (49713888).

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

22751232 is an equidigital number, since it uses as much as digits as its factorization.

22751232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 35 counting only the distinct ones).

The product of its digits is 1680, while the sum is 24.

The square root of 22751232 is about 4769.8251540282. The cubic root of 22751232 is about 283.3576701894.

Adding to 22751232 its reverse (23215722), we get a palindrome (45966954).

The spelling of 22751232 in words is "twenty-two million, seven hundred fifty-one thousand, two hundred thirty-two".