161642322 has 24 divisors (see below), whose sum is σ = 350500176. Its totient is φ = 53838456.

The previous prime is 161642311. The next prime is 161642323. The reversal of 161642322 is 223246161.

161642322 is a `hidden beast` number, since 1 + 616 + 4 + 23 + 22 = 666.

161642322 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161642322² = 52256480523103368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161642323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27313 + ... + 32699.

It is an arithmetic number, because the mean of its divisors is an integer number (14604174).

Almost surely, 2^161642322 is an apocalyptic number.

161642322 is an abundant number, since it is smaller than the sum of its proper divisors (188857854).

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

161642322 is a wasteful number, since it uses less digits than its factorization.

161642322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7062 (or 7059 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 161642322 is about 12713.8633782183. The cubic root of 161642322 is about 544.7346821819.

Adding to 161642322 its reverse (223246161), we get a palindrome (384888483).

The spelling of 161642322 in words is "one hundred sixty-one million, six hundred forty-two thousand, three hundred twenty-two".