188161 has 4 divisors (see below), whose sum is σ = 190512. Its totient is φ = 185812.

The previous prime is 188159. The next prime is 188171. The reversal of 188161 is 161881.

It is a happy number.

188161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 188161 - 2¹ = 188159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188171) 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, 1051 + ... + 1216.

It is an arithmetic number, because the mean of its divisors is an integer number (47628).

2¹⁸⁸¹⁶¹ is an apocalyptic number.

It is an amenable number.

188161 is a deficient number, since it is larger than the sum of its proper divisors (2351).

188161 is an equidigital number, since it uses as much as digits as its factorization.

188161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350.

The product of its digits is 384, while the sum is 25.

The square root of 188161 is about 433.7752874473. The cubic root of 188161 is about 57.3028915674.

The spelling of 188161 in words is "one hundred eighty-eight thousand, one hundred sixty-one".