163881172 has 24 divisors (see below), whose sum is σ = 352975616. Its totient is φ = 64831968.

The previous prime is 163881169. The next prime is 163881199. The reversal of 163881172 is 271188361.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224748 + ... + 225475.

Almost surely, 2^163881172 is an apocalyptic number.

It is an amenable number.

163881172 is an abundant number, since it is smaller than the sum of its proper divisors (189094444).

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

163881172 is a wasteful number, since it uses less digits than its factorization.

163881172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450247 (or 450245 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 163881172 is about 12801.6081802249. The cubic root of 163881172 is about 547.2381344686.

The spelling of 163881172 in words is "one hundred sixty-three million, eight hundred eighty-one thousand, one hundred seventy-two".