218041911 has 6 divisors (see below), whose sum is σ = 314949440. Its totient is φ = 145361268.

The previous prime is 218041907. The next prime is 218041921. The reversal of 218041911 is 119140812.

It is not a de Polignac number, because 218041911 - 2² = 218041907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218041921) 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, 12113431 + ... + 12113448.

Almost surely, 2^218041911 is an apocalyptic number.

218041911 is a deficient number, since it is larger than the sum of its proper divisors (96907529).

218041911 is a wasteful number, since it uses less digits than its factorization.

218041911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24226885 (or 24226882 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 218041911 is about 14766.2422775735. The cubic root of 218041911 is about 601.8847317778.

The spelling of 218041911 in words is "two hundred eighteen million, forty-one thousand, nine hundred eleven".