171678213 has 36 divisors (see below), whose sum is σ = 292582368. Its totient is φ = 96702480.

The previous prime is 171678209. The next prime is 171678253. The reversal of 171678213 is 312876171.

It is not a de Polignac number, because 171678213 - 2² = 171678209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171678203) 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 35 ways as a sum of consecutive naturals, for example, 28570 + ... + 34052.

It is an arithmetic number, because the mean of its divisors is an integer number (8127288).

Almost surely, 2^171678213 is an apocalyptic number.

It is an amenable number.

171678213 is a deficient number, since it is larger than the sum of its proper divisors (120904155).

171678213 is a wasteful number, since it uses less digits than its factorization.

171678213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5574 (or 5564 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 171678213 is about 13102.6032909495. The cubic root of 171678213 is about 555.7827474886.

The spelling of 171678213 in words is "one hundred seventy-one million, six hundred seventy-eight thousand, two hundred thirteen".