22143072 has 96 divisors (see below), whose sum is σ = 67398912. Its totient is φ = 6234624.

The previous prime is 22143071. The next prime is 22143073. The reversal of 22143072 is 27034122.

It is an interprime number because it is at equal distance from previous prime (22143071) and next prime (22143073).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55578 + ... + 55974.

It is an arithmetic number, because the mean of its divisors is an integer number (702072).

Almost surely, 2^22143072 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 22143072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33699456).

22143072 is an abundant number, since it is smaller than the sum of its proper divisors (45255840).

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

22143072 is a wasteful number, since it uses less digits than its factorization.

22143072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 22143072 is about 4705.6425703617. The cubic root of 22143072 is about 280.8100352742.

Adding to 22143072 its reverse (27034122), we get a palindrome (49177194).

The spelling of 22143072 in words is "twenty-two million, one hundred forty-three thousand, seventy-two".