161885271 has 8 divisors (see below), whose sum is σ = 228543984. Its totient is φ = 101575040.

The previous prime is 161885257. The next prime is 161885281. The reversal of 161885271 is 172588161.

161885271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161885271 - 2¹⁸ = 161623127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161885281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1587060 + ... + 1587161.

It is an arithmetic number, because the mean of its divisors is an integer number (28567998).

Almost surely, 2^161885271 is an apocalyptic number.

161885271 is a deficient number, since it is larger than the sum of its proper divisors (66658713).

161885271 is a wasteful number, since it uses less digits than its factorization.

161885271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3174241.

The product of its digits is 26880, while the sum is 39.

The square root of 161885271 is about 12723.4142823379. The cubic root of 161885271 is about 545.0074583049.

The spelling of 161885271 in words is "one hundred sixty-one million, eight hundred eighty-five thousand, two hundred seventy-one".