212170871 has 8 divisors (see below), whose sum is σ = 235254288. Its totient is φ = 189720000.

The previous prime is 212170867. The next prime is 212170879. The reversal of 212170871 is 178071212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212170871 - 2² = 212170867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212170879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157430 + ... + 158771.

It is an arithmetic number, because the mean of its divisors is an integer number (29406786).

Almost surely, 2^212170871 is an apocalyptic number.

212170871 is a deficient number, since it is larger than the sum of its proper divisors (23083417).

212170871 is a wasteful number, since it uses less digits than its factorization.

212170871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316273.

The product of its (nonzero) digits is 1568, while the sum is 29.

The square root of 212170871 is about 14566.0863309264. The cubic root of 212170871 is about 596.4333505485.

The spelling of 212170871 in words is "two hundred twelve million, one hundred seventy thousand, eight hundred seventy-one".