218880005 has 8 divisors (see below), whose sum is σ = 263282424. Its totient is φ = 174686400.

The previous prime is 218880001. The next prime is 218880043. The reversal of 218880005 is 500088812.

It can be written as a sum of positive squares in 4 ways, for example, as 2024929 + 216855076 = 1423^2 + 14726^2 .

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

It is not a de Polignac number, because 218880005 - 2² = 218880001 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 (218880001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49886 + ... + 54095.

It is an arithmetic number, because the mean of its divisors is an integer number (32910303).

Almost surely, 2^218880005 is an apocalyptic number.

It is an amenable number.

218880005 is a deficient number, since it is larger than the sum of its proper divisors (44402419).

218880005 is a wasteful number, since it uses less digits than its factorization.

218880005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104407.

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 218880005 is about 14794.5937761062. The cubic root of 218880005 is about 602.6549064224.

The spelling of 218880005 in words is "two hundred eighteen million, eight hundred eighty thousand, five".