199242172 has 12 divisors (see below), whose sum is σ = 351420160. Its totient is φ = 98836416.

The previous prime is 199242167. The next prime is 199242179. The reversal of 199242172 is 271242991.

199242172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199242179) 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, 195597 + ... + 196612.

Almost surely, 2^199242172 is an apocalyptic number.

It is an amenable number.

199242172 is a deficient number, since it is larger than the sum of its proper divisors (152177988).

199242172 is a wasteful number, since it uses less digits than its factorization.

199242172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392340 (or 392338 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 199242172 is about 14115.3169287834. The cubic root of 199242172 is about 584.0639785728.

The spelling of 199242172 in words is "one hundred ninety-nine million, two hundred forty-two thousand, one hundred seventy-two".