22153712 has 40 divisors (see below), whose sum is σ = 49330176. Its totient is φ = 9441216.

The previous prime is 22153711. The next prime is 22153717. The reversal of 22153712 is 21735122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22153711) 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, 24533 + ... + 25419.

Almost surely, 2^22153712 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 22153712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24665088).

22153712 is an abundant number, since it is smaller than the sum of its proper divisors (27176464).

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

22153712 is a wasteful number, since it uses less digits than its factorization.

22153712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125 (or 1119 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 22153712 is about 4706.7729921890. The cubic root of 22153712 is about 280.8550055527.

Adding to 22153712 its reverse (21735122), we get a palindrome (43888834).

The spelling of 22153712 in words is "twenty-two million, one hundred fifty-three thousand, seven hundred twelve".