161446171 has 4 divisors (see below), whose sum is σ = 166654144. Its totient is φ = 156238200.

The previous prime is 161446169. The next prime is 161446189. The reversal of 161446171 is 171644161.

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 161446171 - 2¹ = 161446169 is a prime.

It is a super-2 number, since 2×161446171² = 52129732261122482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 5207941 = 161446171 / (1 + 6 + 1 + 4 + 4 + 6 + 1 + 7 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161440171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2603940 + ... + 2604001.

It is an arithmetic number, because the mean of its divisors is an integer number (41663536).

Almost surely, 2^161446171 is an apocalyptic number.

161446171 is a deficient number, since it is larger than the sum of its proper divisors (5207973).

161446171 is an equidigital number, since it uses as much as digits as its factorization.

161446171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5207972.

The product of its digits is 4032, while the sum is 31.

The square root of 161446171 is about 12706.1469769557. The cubic root of 161446171 is about 544.5142500142.

The spelling of 161446171 in words is "one hundred sixty-one million, four hundred forty-six thousand, one hundred seventy-one".