161982422 has 32 divisors (see below), whose sum is σ = 290594304. Its totient is φ = 66211200.

The previous prime is 161982407. The next prime is 161982451. The reversal of 161982422 is 224289161.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 183422 + ... + 184302.

It is an arithmetic number, because the mean of its divisors is an integer number (9081072).

Almost surely, 2^161982422 is an apocalyptic number.

161982422 is a deficient number, since it is larger than the sum of its proper divisors (128611882).

161982422 is a wasteful number, since it uses less digits than its factorization.

161982422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484.

The product of its digits is 13824, while the sum is 35.

The square root of 161982422 is about 12727.2315135696. The cubic root of 161982422 is about 545.1164602564.

The spelling of 161982422 in words is "one hundred sixty-one million, nine hundred eighty-two thousand, four hundred twenty-two".