218108073 has 16 divisors (see below), whose sum is σ = 297086400. Its totient is φ = 142290240.

The previous prime is 218108071. The next prime is 218108119. The reversal of 218108073 is 370801812.

It is a happy number.

It is not a de Polignac number, because 218108073 - 2¹ = 218108071 is a prime.

It is a super-2 number, since 2×218108073² = 95142263015546658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 218108073.

It is not an unprimeable number, because it can be changed into a prime (218108071) 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, 37843 + ... + 43223.

It is an arithmetic number, because the mean of its divisors is an integer number (18567900).

Almost surely, 2^218108073 is an apocalyptic number.

It is an amenable number.

218108073 is a deficient number, since it is larger than the sum of its proper divisors (78978327).

218108073 is a wasteful number, since it uses less digits than its factorization.

218108073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5672.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 218108073 is about 14768.4824203437. The cubic root of 218108073 is about 601.9456036691.

Adding to 218108073 its reverse (370801812), we get a palindrome (588909885).

The spelling of 218108073 in words is "two hundred eighteen million, one hundred eight thousand, seventy-three".