275500280305 has 4 divisors (see below), whose sum is σ = 330600336372. Its totient is φ = 220400224240.

The previous prime is 275500280303. The next prime is 275500280317. The reversal of 275500280305 is 503082005572.

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 211806130176 + 63694150129 = 460224^2 + 252377^2 .

It is not a de Polignac number, because 275500280305 - 2¹ = 275500280303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (275500280303) 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, 27550028026 + ... + 27550028035.

It is an arithmetic number, because the mean of its divisors is an integer number (82650084093).

Almost surely, 2^275500280305 is an apocalyptic number.

It is an amenable number.

275500280305 is a deficient number, since it is larger than the sum of its proper divisors (55100056067).

275500280305 is an equidigital number, since it uses as much as digits as its factorization.

275500280305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55100056066.

The product of its (nonzero) digits is 84000, while the sum is 37.

Adding to 275500280305 its reverse (503082005572), we get a palindrome (778582285877).

The spelling of 275500280305 in words is "two hundred seventy-five billion, five hundred million, two hundred eighty thousand, three hundred five".