218220206015 has 8 divisors (see below), whose sum is σ = 299273425440. Its totient is φ = 149636712672.

The previous prime is 218220205997. The next prime is 218220206063. The reversal of 218220206015 is 510602022812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 218220206015 - 2³² = 213925238719 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3117431480 + ... + 3117431549.

It is an arithmetic number, because the mean of its divisors is an integer number (37409178180).

Almost surely, 2^218220206015 is an apocalyptic number.

218220206015 is a deficient number, since it is larger than the sum of its proper divisors (81053219425).

218220206015 is an equidigital number, since it uses as much as digits as its factorization.

218220206015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6234863041.

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 218220206015 its reverse (510602022812), we get a palindrome (728822228827).

The spelling of 218220206015 in words is "two hundred eighteen billion, two hundred twenty million, two hundred six thousand, fifteen".