22722232 has 32 divisors (see below), whose sum is σ = 46957680. Its totient is φ = 10241280.

The previous prime is 22722223. The next prime is 22722247. The reversal of 22722232 is 23222722.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1932 + ... + 7012.

Almost surely, 2^22722232 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 22722232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23478840).

22722232 is an abundant number, since it is smaller than the sum of its proper divisors (24235448).

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

22722232 is a wasteful number, since it uses less digits than its factorization.

22722232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5143 (or 5139 counting only the distinct ones).

The product of its digits is 1344, while the sum is 22.

The square root of 22722232 is about 4766.7842409742. The cubic root of 22722232 is about 283.2372244578.

Adding to 22722232 its reverse (23222722), we get a palindrome (45944954).

The spelling of 22722232 in words is "twenty-two million, seven hundred twenty-two thousand, two hundred thirty-two".