218272871 has 2 divisors, whose sum is σ = 218272872. Its totient is φ = 218272870.

The previous prime is 218272853. The next prime is 218272909. The reversal of 218272871 is 178272812.

It is an a-pointer prime, because the next prime (218272909) can be obtained adding 218272871 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218272871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218272471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109136435 + 109136436.

It is an arithmetic number, because the mean of its divisors is an integer number (109136436).

Almost surely, 2^218272871 is an apocalyptic number.

218272871 is a deficient number, since it is larger than the sum of its proper divisors (1).

218272871 is an equidigital number, since it uses as much as digits as its factorization.

218272871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 38.

The square root of 218272871 is about 14774.0607484875. The cubic root of 218272871 is about 602.0971714314.

The spelling of 218272871 in words is "two hundred eighteen million, two hundred seventy-two thousand, eight hundred seventy-one".