275450221 has 16 divisors (see below), whose sum is σ = 293529600. Its totient is φ = 258071040.

The previous prime is 275450183. The next prime is 275450233. The reversal of 275450221 is 122054572.

It is a cyclic number.

It is not a de Polignac number, because 275450221 - 2²⁵ = 241895789 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 275450221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275450281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140355 + ... + 142303.

It is an arithmetic number, because the mean of its divisors is an integer number (18345600).

Almost surely, 2^275450221 is an apocalyptic number.

It is an amenable number.

275450221 is a deficient number, since it is larger than the sum of its proper divisors (18079379).

275450221 is a wasteful number, since it uses less digits than its factorization.

275450221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 275450221 is about 16596.6930742242. The cubic root of 275450221 is about 650.6504108938.

It can be divided in two parts, 2754 and 50221, that added together give a triangular number (52975 = T₃₂₅).

The spelling of 275450221 in words is "two hundred seventy-five million, four hundred fifty thousand, two hundred twenty-one".