161543226 has 32 divisors (see below), whose sum is σ = 349046208. Its totient is φ = 49547520.

The previous prime is 161543209. The next prime is 161543227. The reversal of 161543226 is 622345161.

It is a junction number, because it is equal to n+sod(n) for n = 161543193 and 161543202.

It is not an unprimeable number, because it can be changed into a prime (161543227) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 22690 + ... + 28946.

It is an arithmetic number, because the mean of its divisors is an integer number (10907694).

Almost surely, 2^161543226 is an apocalyptic number.

161543226 is an abundant number, since it is smaller than the sum of its proper divisors (187502982).

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

161543226 is a wasteful number, since it uses less digits than its factorization.

161543226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6606.

The product of its digits is 8640, while the sum is 30.

The square root of 161543226 is about 12709.9656175774. The cubic root of 161543226 is about 544.6233415744.

Adding to 161543226 its reverse (622345161), we get a palindrome (783888387).

The spelling of 161543226 in words is "one hundred sixty-one million, five hundred forty-three thousand, two hundred twenty-six".