161165211 has 8 divisors (see below), whose sum is σ = 215042640. Its totient is φ = 107365632.

The previous prime is 161165203. The next prime is 161165231. The reversal of 161165211 is 112561161.

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

It is not a de Polignac number, because 161165211 - 2³ = 161165203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161165231) 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 7 ways as a sum of consecutive naturals, for example, 14446 + ... + 23043.

It is an arithmetic number, because the mean of its divisors is an integer number (26880330).

Almost surely, 2^161165211 is an apocalyptic number.

161165211 is a deficient number, since it is larger than the sum of its proper divisors (53877429).

161165211 is a wasteful number, since it uses less digits than its factorization.

161165211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38925.

The product of its digits is 360, while the sum is 24.

The square root of 161165211 is about 12695.0860965966. The cubic root of 161165211 is about 544.1981992530.

The spelling of 161165211 in words is "one hundred sixty-one million, one hundred sixty-five thousand, two hundred eleven".