22143132 has 144 divisors (see below), whose sum is σ = 67267200. Its totient is φ = 6298560.

The previous prime is 22143127. The next prime is 22143133. The reversal of 22143132 is 23134122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (288) is a multiple of the sum of its prime divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 203094 + ... + 203202.

Almost surely, 2^22143132 is an apocalyptic number.

22143132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22143132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33633600).

22143132 is an abundant number, since it is smaller than the sum of its proper divisors (45124068).

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

22143132 is a wasteful number, since it uses less digits than its factorization.

22143132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 144 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 22143132 is about 4705.6489456822. The cubic root of 22143132 is about 280.8102889064.

Adding to 22143132 its reverse (23134122), we get a palindrome (45277254).

The spelling of 22143132 in words is "twenty-two million, one hundred forty-three thousand, one hundred thirty-two".