218256263 has 2 divisors, whose sum is σ = 218256264. Its totient is φ = 218256262.

The previous prime is 218256239. The next prime is 218256277. The reversal of 218256263 is 362652812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218256263 - 2²² = 214061959 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218256293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109128131 + 109128132.

It is an arithmetic number, because the mean of its divisors is an integer number (109128132).

Almost surely, 2^218256263 is an apocalyptic number.

218256263 is a deficient number, since it is larger than the sum of its proper divisors (1).

218256263 is an equidigital number, since it uses as much as digits as its factorization.

218256263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 218256263 is about 14773.4986716079. The cubic root of 218256263 is about 602.0819002048.

The spelling of 218256263 in words is "two hundred eighteen million, two hundred fifty-six thousand, two hundred sixty-three".