161814211 has 8 divisors (see below), whose sum is σ = 184512384. Its totient is φ = 140580480.

The previous prime is 161814187. The next prime is 161814217. The reversal of 161814211 is 112418161.

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

It is not a de Polignac number, because 161814211 - 2⁹ = 161813699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161814217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365875 + ... + 366316.

It is an arithmetic number, because the mean of its divisors is an integer number (23064048).

Almost surely, 2^161814211 is an apocalyptic number.

161814211 is a deficient number, since it is larger than the sum of its proper divisors (22698173).

161814211 is a wasteful number, since it uses less digits than its factorization.

161814211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732221.

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

The square root of 161814211 is about 12720.6214863897. The cubic root of 161814211 is about 544.9277024429.

The spelling of 161814211 in words is "one hundred sixty-one million, eight hundred fourteen thousand, two hundred eleven".