172235172 has 12 divisors (see below), whose sum is σ = 401882096. Its totient is φ = 57411720.

The previous prime is 172235159. The next prime is 172235179. The reversal of 172235172 is 271532271.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (172235179) 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, 7176454 + ... + 7176477.

Almost surely, 2^172235172 is an apocalyptic number.

172235172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172235172 is an abundant number, since it is smaller than the sum of its proper divisors (229646924).

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

172235172 is a wasteful number, since it uses less digits than its factorization.

172235172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14352938 (or 14352936 counting only the distinct ones).

The product of its digits is 5880, while the sum is 30.

The square root of 172235172 is about 13123.8398344387. The cubic root of 172235172 is about 556.3831227568.

The spelling of 172235172 in words is "one hundred seventy-two million, two hundred thirty-five thousand, one hundred seventy-two".