316170021 has 8 divisors (see below), whose sum is σ = 422138080. Its totient is φ = 210490992.

The previous prime is 316169999. The next prime is 316170031. The reversal of 316170021 is 120071613.

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

It is not a de Polignac number, because 316170021 - 2¹³ = 316161829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 316170021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316170031) 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, 69691 + ... + 74088.

It is an arithmetic number, because the mean of its divisors is an integer number (52767260).

Almost surely, 2^316170021 is an apocalyptic number.

It is an amenable number.

316170021 is a deficient number, since it is larger than the sum of its proper divisors (105968059).

316170021 is a wasteful number, since it uses less digits than its factorization.

316170021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144515.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 316170021 is about 17781.1704057973. The cubic root of 316170021 is about 681.2505972444.

The spelling of 316170021 in words is "three hundred sixteen million, one hundred seventy thousand, twenty-one".