275155261 has 2 divisors, whose sum is σ = 275155262. Its totient is φ = 275155260.

The previous prime is 275155259. The next prime is 275155267. The reversal of 275155261 is 162551572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231344100 + 43811161 = 15210^2 + 6619^2 .

It is a cyclic number.

It is not a de Polignac number, because 275155261 - 2¹ = 275155259 is a prime.

Together with 275155259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275155267) 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, 137577630 + 137577631.

It is an arithmetic number, because the mean of its divisors is an integer number (137577631).

Almost surely, 2^275155261 is an apocalyptic number.

It is an amenable number.

275155261 is a deficient number, since it is larger than the sum of its proper divisors (1).

275155261 is an equidigital number, since it uses as much as digits as its factorization.

275155261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 34.

The square root of 275155261 is about 16587.8045865027. The cubic root of 275155261 is about 650.4180829033.

The spelling of 275155261 in words is "two hundred seventy-five million, one hundred fifty-five thousand, two hundred sixty-one".