220375587217 has 4 divisors (see below), whose sum is σ = 220378605876. Its totient is φ = 220372568560.

The previous prime is 220375587209. The next prime is 220375587227. The reversal of 220375587217 is 712785573022.

220375587217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 92961570816 + 127414016401 = 304896^2 + 356951^2 .

It is a cyclic number.

It is not a de Polignac number, because 220375587217 - 2³ = 220375587209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220375587227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397038 + ... + 1546759.

It is an arithmetic number, because the mean of its divisors is an integer number (55094651469).

Almost surely, 2^220375587217 is an apocalyptic number.

It is an amenable number.

220375587217 is a deficient number, since it is larger than the sum of its proper divisors (3018659).

220375587217 is an equidigital number, since it uses as much as digits as its factorization.

220375587217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018658.

The product of its (nonzero) digits is 1646400, while the sum is 49.

The spelling of 220375587217 in words is "two hundred twenty billion, three hundred seventy-five million, five hundred eighty-seven thousand, two hundred seventeen".