218018145 has 16 divisors (see below), whose sum is σ = 350122752. Its totient is φ = 115845120.

The previous prime is 218018137. The next prime is 218018161. The reversal of 218018145 is 541810812.

It is a happy number.

It is not a de Polignac number, because 218018145 - 2³ = 218018137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22752 + ... + 30881.

It is an arithmetic number, because the mean of its divisors is an integer number (21882672).

Almost surely, 2^218018145 is an apocalyptic number.

It is an amenable number.

218018145 is a deficient number, since it is larger than the sum of its proper divisors (132104607).

218018145 is a wasteful number, since it uses less digits than its factorization.

218018145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53912.

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 218018145 is about 14765.4375146827. The cubic root of 218018145 is about 601.8628630276.

Adding to 218018145 its reverse (541810812), we get a palindrome (759828957).

The spelling of 218018145 in words is "two hundred eighteen million, eighteen thousand, one hundred forty-five".