161933172 has 12 divisors (see below), whose sum is σ = 377844096. Its totient is φ = 53977720.

The previous prime is 161933159. The next prime is 161933207. The reversal of 161933172 is 271339161.

161933172 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6747204 + ... + 6747227.

It is an arithmetic number, because the mean of its divisors is an integer number (31487008).

Almost surely, 2^161933172 is an apocalyptic number.

161933172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161933172 is an abundant number, since it is smaller than the sum of its proper divisors (215910924).

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

161933172 is a wasteful number, since it uses less digits than its factorization.

161933172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13494438 (or 13494436 counting only the distinct ones).

The product of its digits is 6804, while the sum is 33.

The square root of 161933172 is about 12725.2965387845. The cubic root of 161933172 is about 545.0612079504.

The spelling of 161933172 in words is "one hundred sixty-one million, nine hundred thirty-three thousand, one hundred seventy-two".