171916 has 6 divisors (see below), whose sum is σ = 300860. Its totient is φ = 85956.

The previous prime is 171889. The next prime is 171917. The reversal of 171916 is 619171.

It is a super-2 number, since 2×171916² = 59110222112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (171917) by changing a digit.

171916 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21486 + ... + 21493.

2¹⁷¹⁹¹⁶ is an apocalyptic number.

It is an amenable number.

171916 is a deficient number, since it is larger than the sum of its proper divisors (128944).

171916 is a wasteful number, since it uses less digits than its factorization.

171916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42983 (or 42981 counting only the distinct ones).

The product of its digits is 378, while the sum is 25.

The square root of 171916 is about 414.6275437064. The cubic root of 171916 is about 55.6039229156.

It can be divided in two parts, 1 and 71916, that added together give a palindrome (71917).

The spelling of 171916 in words is "one hundred seventy-one thousand, nine hundred sixteen".