275007221 has 2 divisors, whose sum is σ = 275007222. Its totient is φ = 275007220.

The previous prime is 275007209. The next prime is 275007253. The reversal of 275007221 is 122700572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190826596 + 84180625 = 13814^2 + 9175^2 .

It is a cyclic number.

It is not a de Polignac number, because 275007221 - 2¹⁰ = 275006197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275007281) 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 as a sum of consecutive naturals, namely, 137503610 + 137503611.

It is an arithmetic number, because the mean of its divisors is an integer number (137503611).

Almost surely, 2^275007221 is an apocalyptic number.

It is an amenable number.

275007221 is a deficient number, since it is larger than the sum of its proper divisors (1).

275007221 is an equidigital number, since it uses as much as digits as its factorization.

275007221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 275007221 is about 16583.3416716897. The cubic root of 275007221 is about 650.3014152370.

Adding to 275007221 its reverse (122700572), we get a palindrome (397707793).

The spelling of 275007221 in words is "two hundred seventy-five million, seven thousand, two hundred twenty-one".