218960811 has 6 divisors (see below), whose sum is σ = 316276740. Its totient is φ = 145973868.

The previous prime is 218960771. The next prime is 218960831. The reversal of 218960811 is 118069812.

218960811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 218960811 - 2⁶ = 218960747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218960831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12164481 + ... + 12164498.

It is an arithmetic number, because the mean of its divisors is an integer number (52712790).

Almost surely, 2^218960811 is an apocalyptic number.

218960811 is a deficient number, since it is larger than the sum of its proper divisors (97315929).

218960811 is a wasteful number, since it uses less digits than its factorization.

218960811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24328985 (or 24328982 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 218960811 is about 14797.3244541032. The cubic root of 218960811 is about 602.7290599003.

The spelling of 218960811 in words is "two hundred eighteen million, nine hundred sixty thousand, eight hundred eleven".