161232112 has 40 divisors (see below), whose sum is σ = 330715440. Its totient is φ = 76016640.

The previous prime is 161232101. The next prime is 161232121. The reversal of 161232112 is 211232161.

161232112 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161232112.

It is a congruent number.

It is an unprimeable number.

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, 15912 + ... + 23992.

It is an arithmetic number, because the mean of its divisors is an integer number (8267886).

Almost surely, 2^161232112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161232112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165357720).

161232112 is an abundant number, since it is smaller than the sum of its proper divisors (169483328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161232112 is a wasteful number, since it uses less digits than its factorization.

161232112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8161 (or 8155 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

The square root of 161232112 is about 12697.7207403534. The cubic root of 161232112 is about 544.2734892138.

Adding to 161232112 its reverse (211232161), we get a palindrome (372464273).

The spelling of 161232112 in words is "one hundred sixty-one million, two hundred thirty-two thousand, one hundred twelve".