171216946 has 4 divisors (see below), whose sum is σ = 256825422. Its totient is φ = 85608472.

The previous prime is 171216919. The next prime is 171216967. The reversal of 171216946 is 649612171.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 152250921 + 18966025 = 12339^2 + 4355^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42804235 + ... + 42804238.

Almost surely, 2^171216946 is an apocalyptic number.

171216946 is a deficient number, since it is larger than the sum of its proper divisors (85608476).

171216946 is an equidigital number, since it uses as much as digits as its factorization.

171216946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85608475.

The product of its digits is 18144, while the sum is 37.

The square root of 171216946 is about 13084.9893389334. The cubic root of 171216946 is about 555.2845398628.

The spelling of 171216946 in words is "one hundred seventy-one million, two hundred sixteen thousand, nine hundred forty-six".