201688172 has 12 divisors (see below), whose sum is σ = 403376400. Its totient is φ = 86437776.

The previous prime is 201688171. The next prime is 201688181. The reversal of 201688172 is 271886102.

201688172 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (201688171) 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, 3601547 + ... + 3601602.

It is an arithmetic number, because the mean of its divisors is an integer number (33614700).

Almost surely, 2^201688172 is an apocalyptic number.

It is an amenable number.

201688172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

201688172 is a wasteful number, since it uses less digits than its factorization.

201688172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7203160 (or 7203158 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 201688172 is about 14201.6960958894. The cubic root of 201688172 is about 586.4443546162. Note that the first 3 decimals are identical.

The spelling of 201688172 in words is "two hundred one million, six hundred eighty-eight thousand, one hundred seventy-two".