218081141 has 4 divisors (see below), whose sum is σ = 218986284. Its totient is φ = 217176000.

The previous prime is 218081137. The next prime is 218081153. The reversal of 218081141 is 141180812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 197514916 + 20566225 = 14054^2 + 4535^2 .

It is a cyclic number.

It is not a de Polignac number, because 218081141 - 2² = 218081137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 218081141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218081191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452210 + ... + 452691.

It is an arithmetic number, because the mean of its divisors is an integer number (54746571).

Almost surely, 2^218081141 is an apocalyptic number.

It is an amenable number.

218081141 is a deficient number, since it is larger than the sum of its proper divisors (905143).

218081141 is an equidigital number, since it uses as much as digits as its factorization.

218081141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905142.

The product of its (nonzero) digits is 512, while the sum is 26.

The square root of 218081141 is about 14767.5705855770. The cubic root of 218081141 is about 601.9208265543.

The spelling of 218081141 in words is "two hundred eighteen million, eighty-one thousand, one hundred forty-one".