72176021222 has 32 divisors (see below), whose sum is σ = 114424773120. Its totient is φ = 34088955040.

The previous prime is 72176021207. The next prime is 72176021227. The reversal of 72176021222 is 22212067127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72176021227) 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, 13046597 + ... + 13052127.

It is an arithmetic number, because the mean of its divisors is an integer number (3575774160).

Almost surely, 2^72176021222 is an apocalyptic number.

72176021222 is a deficient number, since it is larger than the sum of its proper divisors (42248751898).

72176021222 is a wasteful number, since it uses less digits than its factorization.

72176021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10396.

The product of its (nonzero) digits is 9408, while the sum is 32.

Adding to 72176021222 its reverse (22212067127), we get a palindrome (94388088349).

The spelling of 72176021222 in words is "seventy-two billion, one hundred seventy-six million, twenty-one thousand, two hundred twenty-two".