275317221 has 4 divisors (see below), whose sum is σ = 367089632. Its totient is φ = 183544812.

The previous prime is 275317219. The next prime is 275317223. The reversal of 275317221 is 122713572.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (275317219) and next prime (275317223).

It is not a de Polignac number, because 275317221 - 2¹ = 275317219 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275317223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45886201 + ... + 45886206.

It is an arithmetic number, because the mean of its divisors is an integer number (91772408).

Almost surely, 2^275317221 is an apocalyptic number.

It is an amenable number.

275317221 is a deficient number, since it is larger than the sum of its proper divisors (91772411).

275317221 is an equidigital number, since it uses as much as digits as its factorization.

275317221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91772410.

The product of its digits is 5880, while the sum is 30.

The square root of 275317221 is about 16592.6857681329. The cubic root of 275317221 is about 650.5456727479.

The spelling of 275317221 in words is "two hundred seventy-five million, three hundred seventeen thousand, two hundred twenty-one".