171691216 has 10 divisors (see below), whose sum is σ = 332651762. Its totient is φ = 85845600.

The previous prime is 171691207. The next prime is 171691243. The reversal of 171691216 is 612196171.

171691216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 158760000 + 12931216 = 12600^2 + 3596^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5365335 + ... + 5365366.

Almost surely, 2^171691216 is an apocalyptic number.

171691216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

171691216 is a deficient number, since it is larger than the sum of its proper divisors (160960546).

171691216 is a wasteful number, since it uses less digits than its factorization.

171691216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10730709 (or 10730703 counting only the distinct ones).

The product of its digits is 4536, while the sum is 34.

The square root of 171691216 is about 13103.0994806572. The cubic root of 171691216 is about 555.7967788956.

The spelling of 171691216 in words is "one hundred seventy-one million, six hundred ninety-one thousand, two hundred sixteen".