218412143 has 4 divisors (see below), whose sum is σ = 225457728. Its totient is φ = 211366560.

The previous prime is 218412133. The next prime is 218412167. The reversal of 218412143 is 341214812.

218412143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 218412143 - 2¹⁴ = 218395759 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 (218412133) 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, 3522746 + ... + 3522807.

It is an arithmetic number, because the mean of its divisors is an integer number (56364432).

Almost surely, 2^218412143 is an apocalyptic number.

218412143 is a deficient number, since it is larger than the sum of its proper divisors (7045585).

218412143 is an equidigital number, since it uses as much as digits as its factorization.

218412143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7045584.

The product of its digits is 1536, while the sum is 26.

The square root of 218412143 is about 14778.7733929444. The cubic root of 218412143 is about 602.2252029915.

Adding to 218412143 its reverse (341214812), we get a palindrome (559626955).

The spelling of 218412143 in words is "two hundred eighteen million, four hundred twelve thousand, one hundred forty-three".