171320812 has 12 divisors (see below), whose sum is σ = 322873936. Its totient is φ = 79071120.

The previous prime is 171320783. The next prime is 171320819. The reversal of 171320812 is 218023171.

It is a happy number.

171320812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (171320819) 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, 1647264 + ... + 1647367.

Almost surely, 2^171320812 is an apocalyptic number.

It is an amenable number.

171320812 is a deficient number, since it is larger than the sum of its proper divisors (151553124).

171320812 is a wasteful number, since it uses less digits than its factorization.

171320812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3294648 (or 3294646 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 171320812 is about 13088.9576361145. The cubic root of 171320812 is about 555.3968019698.

Adding to 171320812 its reverse (218023171), we get a palindrome (389343983).

The spelling of 171320812 in words is "one hundred seventy-one million, three hundred twenty thousand, eight hundred twelve".