161884271 has 4 divisors (see below), whose sum is σ = 161938344. Its totient is φ = 161830200.

The previous prime is 161884267. The next prime is 161884273. The reversal of 161884271 is 172488161.

It is a happy number.

161884271 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.

It is a cyclic number.

It is not a de Polignac number, because 161884271 - 2² = 161884267 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161884273) 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, 22265 + ... + 28626.

It is an arithmetic number, because the mean of its divisors is an integer number (40484586).

Almost surely, 2^161884271 is an apocalyptic number.

161884271 is a deficient number, since it is larger than the sum of its proper divisors (54073).

161884271 is an equidigital number, since it uses as much as digits as its factorization.

161884271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54072.

The product of its digits is 21504, while the sum is 38.

The square root of 161884271 is about 12723.3749846493. The cubic root of 161884271 is about 545.0063360933.

The spelling of 161884271 in words is "one hundred sixty-one million, eight hundred eighty-four thousand, two hundred seventy-one".