218102145 has 16 divisors (see below), whose sum is σ = 354685632. Its totient is φ = 114413760.

The previous prime is 218102141. The next prime is 218102201. The reversal of 218102145 is 541201812.

It is not a de Polignac number, because 218102145 - 2² = 218102141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (218102141) 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, 118267 + ... + 120096.

It is an arithmetic number, because the mean of its divisors is an integer number (22167852).

Almost surely, 2^218102145 is an apocalyptic number.

It is an amenable number.

218102145 is a deficient number, since it is larger than the sum of its proper divisors (136583487).

218102145 is a wasteful number, since it uses less digits than its factorization.

218102145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238432.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 218102145 is about 14768.2817213107. The cubic root of 218102145 is about 601.9401501557.

Adding to 218102145 its reverse (541201812), we get a palindrome (759303957).

The spelling of 218102145 in words is "two hundred eighteen million, one hundred two thousand, one hundred forty-five".