72222222222 has 24 divisors (see below), whose sum is σ = 159810876576. Its totient is φ = 23561859456.

The previous prime is 72222222197. The next prime is 72222222271. The reversal of 72222222222 is 22222222227.

72222222222 is a modest number, since divided by 222222 gives 72222 as remainder.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42683683 + ... + 42685374.

It is an arithmetic number, because the mean of its divisors is an integer number (6658786524).

Almost surely, 2^72222222222 is an apocalyptic number.

72222222222 is an abundant number, since it is smaller than the sum of its proper divisors (87588654354).

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

72222222222 is a wasteful number, since it uses less digits than its factorization.

72222222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85369112 (or 85369109 counting only the distinct ones).

The product of its digits is 7168, while the sum is 27.

Adding to 72222222222 its reverse (22222222227), we get a palindrome (94444444449).

The spelling of 72222222222 in words is "seventy-two billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-two".