218872141 has 2 divisors, whose sum is σ = 218872142. Its totient is φ = 218872140.

The previous prime is 218872133. The next prime is 218872169. The reversal of 218872141 is 141278812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208918116 + 9954025 = 14454^2 + 3155^2 .

It is a cyclic number.

It is not a de Polignac number, because 218872141 - 2³ = 218872133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218872097 and 218872106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218852141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109436070 + 109436071.

It is an arithmetic number, because the mean of its divisors is an integer number (109436071).

Almost surely, 2^218872141 is an apocalyptic number.

It is an amenable number.

218872141 is a deficient number, since it is larger than the sum of its proper divisors (1).

218872141 is an equidigital number, since it uses as much as digits as its factorization.

218872141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 34.

The square root of 218872141 is about 14794.3280009604. The cubic root of 218872141 is about 602.6476888682.

The spelling of 218872141 in words is "two hundred eighteen million, eight hundred seventy-two thousand, one hundred forty-one".