218500541 has 16 divisors (see below), whose sum is σ = 268894080. Its totient is φ = 173276160.

The previous prime is 218500433. The next prime is 218500543. The reversal of 218500541 is 145005812.

218500541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218500541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218500541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218500543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8540 + ... + 22581.

It is an arithmetic number, because the mean of its divisors is an integer number (16805880).

Almost surely, 2^218500541 is an apocalyptic number.

It is an amenable number.

218500541 is a deficient number, since it is larger than the sum of its proper divisors (50393539).

218500541 is a wasteful number, since it uses less digits than its factorization.

218500541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31204.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 218500541 is about 14781.7637986811. The cubic root of 218500541 is about 602.3064382842.

The spelling of 218500541 in words is "two hundred eighteen million, five hundred thousand, five hundred forty-one".