275246821 has 2 divisors, whose sum is σ = 275246822. Its totient is φ = 275246820.

The previous prime is 275246809. The next prime is 275246833. The reversal of 275246821 is 128642572.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (275246809) and next prime (275246833).

It can be written as a sum of positive squares in only one way, i.e., 274266721 + 980100 = 16561^2 + 990^2 .

It is a cyclic number.

It is not a de Polignac number, because 275246821 - 2⁵ = 275246789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275946821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137623410 + 137623411.

It is an arithmetic number, because the mean of its divisors is an integer number (137623411).

Almost surely, 2^275246821 is an apocalyptic number.

It is an amenable number.

275246821 is a deficient number, since it is larger than the sum of its proper divisors (1).

275246821 is an equidigital number, since it uses as much as digits as its factorization.

275246821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 37.

The square root of 275246821 is about 16590.5642158427. The cubic root of 275246821 is about 650.4902187527.

The spelling of 275246821 in words is "two hundred seventy-five million, two hundred forty-six thousand, eight hundred twenty-one".