172220068 has 12 divisors (see below), whose sum is σ = 302195740. Its totient is φ = 85878432.

The previous prime is 172220063. The next prime is 172220093. The reversal of 172220068 is 860022271.

172220068 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 63393444 + 108826624 = 7962^2 + 10432^2 .

It is not an unprimeable number, because it can be changed into a prime (172220063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56223 + ... + 59206.

Almost surely, 2^172220068 is an apocalyptic number.

It is an amenable number.

172220068 is a deficient number, since it is larger than the sum of its proper divisors (129975672).

172220068 is a wasteful number, since it uses less digits than its factorization.

172220068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115806 (or 115804 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 172220068 is about 13123.2643804809. The cubic root of 172220068 is about 556.3668584513.

The spelling of 172220068 in words is "one hundred seventy-two million, two hundred twenty thousand, sixty-eight".