190322161 has 4 divisors (see below), whose sum is σ = 190350324. Its totient is φ = 190294000.

The previous prime is 190322149. The next prime is 190322189. The reversal of 190322161 is 161223091.

190322161 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 161223091 = 829 ⋅194479.

It can be written as a sum of positive squares in 2 ways, for example, as 189750625 + 571536 = 13775^2 + 756^2 .

It is a cyclic number.

It is not a de Polignac number, because 190322161 - 2¹⁹ = 189797873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190320161) 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, 2811 + ... + 19711.

It is an arithmetic number, because the mean of its divisors is an integer number (47587581).

Almost surely, 2^190322161 is an apocalyptic number.

It is an amenable number.

190322161 is a deficient number, since it is larger than the sum of its proper divisors (28163).

190322161 is a wasteful number, since it uses less digits than its factorization.

190322161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28162.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 190322161 is about 13795.7298103435. The cubic root of 190322161 is about 575.2144490588.

The spelling of 190322161 in words is "one hundred ninety million, three hundred twenty-two thousand, one hundred sixty-one".