199016161 has 8 divisors (see below), whose sum is σ = 212897160. Its totient is φ = 185376768.

The previous prime is 199016141. The next prime is 199016179. The reversal of 199016161 is 161610991.

It can be written as a sum of positive squares in 4 ways, for example, as 70896400 + 128119761 = 8420^2 + 11319^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 199016161 - 2¹⁹ = 198491873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199016101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58696 + ... + 61993.

It is an arithmetic number, because the mean of its divisors is an integer number (26612145).

Almost surely, 2^199016161 is an apocalyptic number.

It is an amenable number.

199016161 is a deficient number, since it is larger than the sum of its proper divisors (13880999).

199016161 is a wasteful number, since it uses less digits than its factorization.

199016161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120803.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 199016161 is about 14107.3087794944. The cubic root of 199016161 is about 583.8430500625.

It can be divided in two parts, 19901 and 6161, that added together give a palindrome (26062).

The spelling of 199016161 in words is "one hundred ninety-nine million, sixteen thousand, one hundred sixty-one".