72143322 has 16 divisors (see below), whose sum is σ = 146440992. Its totient is φ = 23688720.

The previous prime is 72143321. The next prime is 72143327. The reversal of 72143322 is 22334127.

It is a junction number, because it is equal to n+sod(n) for n = 72143292 and 72143301.

It is not an unprimeable number, because it can be changed into a prime (72143321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89329 + ... + 90132.

It is an arithmetic number, because the mean of its divisors is an integer number (9152562).

Almost surely, 2^72143322 is an apocalyptic number.

72143322 is an abundant number, since it is smaller than the sum of its proper divisors (74297670).

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

72143322 is a wasteful number, since it uses less digits than its factorization.

72143322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179533.

The product of its digits is 2016, while the sum is 24.

The square root of 72143322 is about 8493.7225054743. The cubic root of 72143322 is about 416.2926203327.

Adding to 72143322 its reverse (22334127), we get a palindrome (94477449).

The spelling of 72143322 in words is "seventy-two million, one hundred forty-three thousand, three hundred twenty-two".