72222887172 has 24 divisors (see below), whose sum is σ = 177389548000. Its totient is φ = 22807227456.

The previous prime is 72222887171. The next prime is 72222887189. The reversal of 72222887172 is 27178822227.

It is a super-2 number, since 2×72222887172² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72222887171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158383297 + ... + 158383752.

Almost surely, 2^72222887172 is an apocalyptic number.

It is an amenable number.

72222887172 is an abundant number, since it is smaller than the sum of its proper divisors (105166660828).

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

72222887172 is a wasteful number, since it uses less digits than its factorization.

72222887172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316767075 (or 316767073 counting only the distinct ones).

The product of its digits is 702464, while the sum is 48.

The spelling of 72222887172 in words is "seventy-two billion, two hundred twenty-two million, eight hundred eighty-seven thousand, one hundred seventy-two".