275555257 has 2 divisors, whose sum is σ = 275555258. Its totient is φ = 275555256.

The previous prime is 275555221. The next prime is 275555263. The reversal of 275555257 is 752555572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 260531881 + 15023376 = 16141^2 + 3876^2 .

It is a cyclic number.

It is not a de Polignac number, because 275555257 - 2¹¹ = 275553209 is a prime.

It is not a weakly prime, because it can be changed into another prime (275555297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137777628 + 137777629.

It is an arithmetic number, because the mean of its divisors is an integer number (137777629).

Almost surely, 2^275555257 is an apocalyptic number.

It is an amenable number.

275555257 is a deficient number, since it is larger than the sum of its proper divisors (1).

275555257 is an equidigital number, since it uses as much as digits as its factorization.

275555257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612500, while the sum is 43.

The square root of 275555257 is about 16599.8571379395. The cubic root of 275555257 is about 650.7331034294.

The spelling of 275555257 in words is "two hundred seventy-five million, five hundred fifty-five thousand, two hundred fifty-seven".