218875811 has 12 divisors (see below), whose sum is σ = 274952496. Its totient is φ = 170551920.

The previous prime is 218875793. The next prime is 218875817. The reversal of 218875811 is 118578812.

It is not a de Polignac number, because 218875811 - 2¹⁴ = 218859427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218875817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128360 + ... + 130053.

It is an arithmetic number, because the mean of its divisors is an integer number (22912708).

Almost surely, 2^218875811 is an apocalyptic number.

218875811 is a deficient number, since it is larger than the sum of its proper divisors (56076685).

218875811 is a wasteful number, since it uses less digits than its factorization.

218875811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258442 (or 258431 counting only the distinct ones).

The product of its digits is 35840, while the sum is 41.

The square root of 218875811 is about 14794.4520344621. The cubic root of 218875811 is about 602.6510572040.

The spelling of 218875811 in words is "two hundred eighteen million, eight hundred seventy-five thousand, eight hundred eleven".