321163217 has 8 divisors (see below), whose sum is σ = 324988776. Its totient is φ = 317348352.

The previous prime is 321163187. The next prime is 321163223. The reversal of 321163217 is 712361123.

It can be written as a sum of positive squares in 4 ways, for example, as 32706961 + 288456256 = 5719^2 + 16984^2 .

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 321163217 - 2⁶ = 321163153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321163417) 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, 68843 + ... + 73359.

It is an arithmetic number, because the mean of its divisors is an integer number (40623597).

Almost surely, 2^321163217 is an apocalyptic number.

It is an amenable number.

321163217 is a deficient number, since it is larger than the sum of its proper divisors (3825559).

321163217 is an equidigital number, since it uses as much as digits as its factorization.

321163217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5347.

The product of its digits is 1512, while the sum is 26.

The square root of 321163217 is about 17921.0272306026. The cubic root of 321163217 is about 684.8181569279.

The spelling of 321163217 in words is "three hundred twenty-one million, one hundred sixty-three thousand, two hundred seventeen".