220671317 has 4 divisors (see below), whose sum is σ = 223150860. Its totient is φ = 218191776.

The previous prime is 220671247. The next prime is 220671331. The reversal of 220671317 is 713176022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15437041 + 205234276 = 3929^2 + 14326^2 .

It is a cyclic number.

It is not a de Polignac number, because 220671317 - 2²⁴ = 203894101 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 220671317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220671397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1239638 + ... + 1239815.

It is an arithmetic number, because the mean of its divisors is an integer number (55787715).

Almost surely, 2^220671317 is an apocalyptic number.

It is an amenable number.

220671317 is a deficient number, since it is larger than the sum of its proper divisors (2479543).

220671317 is an equidigital number, since it uses as much as digits as its factorization.

220671317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479542.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 220671317 is about 14855.0098283374. The cubic root of 220671317 is about 604.2944825500.

The spelling of 220671317 in words is "two hundred twenty million, six hundred seventy-one thousand, three hundred seventeen".