217275263 has 2 divisors, whose sum is σ = 217275264. Its totient is φ = 217275262.

The previous prime is 217275239. The next prime is 217275269. The reversal of 217275263 is 362572712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217275263 - 2⁸ = 217275007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217275269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108637631 + 108637632.

It is an arithmetic number, because the mean of its divisors is an integer number (108637632).

Almost surely, 2^217275263 is an apocalyptic number.

217275263 is a deficient number, since it is larger than the sum of its proper divisors (1).

217275263 is an equidigital number, since it uses as much as digits as its factorization.

217275263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 35.

The square root of 217275263 is about 14740.2599366497. The cubic root of 217275263 is about 601.1784828555.

The spelling of 217275263 in words is "two hundred seventeen million, two hundred seventy-five thousand, two hundred sixty-three".